Update dotnet-runtime dependencies from v7.0 to v8.0

[dlstenbro]

Description

This updates the dependencies for Vintage story v1.21.1 which requires dotnet-runtime v8.0. Right now when the server starts, the it will crash unexpectedly.

Logs showing crash

...
vintagestoryserver  | Support LinuxGSM
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vintagestoryserver  | Consider sponsoring to support development.
vintagestoryserver  | 
vintagestoryserver  | * GitHub: https://github.com/sponsors/dgibbs64
vintagestoryserver  | * Patreon: https://linuxgsm.com/patreon
vintagestoryserver  | * PayPal: https://linuxgsm.com/paypal
vintagestoryserver  | 
vintagestoryserver  | LinuxGSM est. 2012
vintagestoryserver  | 
vintagestoryserver  | Starting Update Checks
vintagestoryserver  | =================================
vintagestoryserver  | update will check every 60 minutes
vintagestoryserver  | 
vintagestoryserver  | Checking for Update vintsserver
vintagestoryserver  | =================================
[ .... ] Updating vintsserver: 
vintagestoryserver  | Installing Gamedig
vintagestoryserver  |   % Total    % Received % Xferd  Average Speed   Time    Time     Time  Current
vintagestoryserver  |                                  Dload  Upload   Total   Spent    Left  Speed
100   746  100   746    0     0   7718      0 --:--:-- --:--:-- --:--:--  7770
vintagestoryserver  | npm warn deprecated [email protected]: Use promise-toolbox/fromEvent instead
vintagestoryserver  | npm warn deprecated [email protected]: See https://github.com/mvdan/sh/issues/1145
vintagestoryserver  | 
vintagestoryserver  | added 60 packages, and audited 61 packages in 1s
vintagestoryserver  | 
vintagestoryserver  | 19 packages are looking for funding
vintagestoryserver  |   run `npm fund` for details
vintagestoryserver  | 
vintagestoryserver  | found 0 vulnerabilities
[  OK  ] Updating vintsserver: Checking for update: vintagestory.at
vintagestoryserver  | 
vintagestoryserver  | Update available
vintagestoryserver  | * Local build: 0
vintagestoryserver  | * Remote build: 1.21.1
vintagestoryserver  | * Branch: stable
vintagestoryserver  | 
vintagestoryserver  | downloading file [ vs_server_linux-x64_1.21.1.tar.gz ]
######################################################################## 100.0%                     
vintagestoryserver  | downloading file [ vs_server_linux-x64_1.21.1.tar.gz ] ... OK
vintagestoryserver  | verifying vs_server_linux-x64_1.21.1.tar.gz with MD5... ... OK
vintagestoryserver  | extracting vs_server_linux-x64_1.21.1.tar.gz... ... OK
vintagestoryserver  | clearing tmp directory [ /app/lgsm/tmp ] ... OK
vintagestoryserver  | server exited unexpectedly
[ FAIL ] Starting vintsserver: Unable to start Vintage Story Server
vintagestoryserver  | 
vintagestoryserver  | 
...

Logs after updating dependency shown below

�[?1h�=18.9.2025 05:33:27 [Server Notification] Server logger started.
�[39;49m18.9.2025 05:33:27 [Server Notification] Game Version: v1.21.1 (Stable)
�[39;49m18.9.2025 05:33:27 [Server Notification] C# Framework: .net 8.0.19
�[39;49m18.9.2025 05:33:27 [Server Notification] Zstd Version: 1.4.8
�[39;49m18.9.2025 05:33:27 [Server Notification] Operating System: Linux (Ubuntu 22.04.5 LTS) [Kernel 6.13.5.200]
�[39;49m18.9.2025 05:33:27 [Server Notification] CPU Cores: 8
�[39;49m18.9.2025 05:33:27 [Server Notification] CPU: AMD Ryzen 5 3400G with Radeon Vega Graphics
�[39;49m18.9.2025 05:33:27 [Server Notification] Available RAM: 30000 MB
�[39;49m18.9.2025 05:33:27 [Server Event] Launching server...
�[39;49m18.9.2025 05:33:27 [Server Event] Server v1.21.1, network v1.21.8, api v1.21.0
�[39;49m18.9.2025 05:33:27 [Server Notification] Entering runphase Initialization
�[39;49m18.9.2025 05:33:27 [Server Event] Loading configuration...
...

Fixes #4818

Type of change

• Bug fix (a change which fixes an issue).
• New feature (a change which adds functionality).
• New Server (new server added).
• Refactor (restructures existing code).
• Comment update (typo, spelling, explanation, examples, etc).

Checklist

PR will not be merged until all steps are complete.

• This pull request links to an issue.
• This pull request uses the develop branch as its base.
• This pull request subject follows the Conventional Commits standard.
• This code follows the style guidelines of this project.
• I have performed a self-review of my code.
• I have checked that this code is commented where required.
• I have provided a detailed enough description of this PR.
• I have checked if documentation needs updating.

Documentation

If documentation does need updating either update it by creating a PR (preferred) or request a documentation update.

• User docs: https://github.com/GameServerManagers/LinuxGSM-Docs
• Dev docs: https://github.com/GameServerManagers/LinuxGSM-Dev-Docs

Thank you for your Pull Request!