[OOB] Upgrades 'dotnet-core' to '4.3.0'

[SvcGitHubPATagentoperatorimages]

Automated OOB update requested by SvcGitHubPATagentoperatorimages.

Agent: dotnet-core
Version: 4.2.26 -> 4.3.0

[github-actions]

Images built:

dotnet-core: ghcr.io/contrast-security-oss/agent-operator-images/agent-dotnet-core@sha256:41ae9bd52ac5c648d73648f4a5a2f4c8739ec63bb420f99742efd06994a568b3
dotnet-framework: ghcr.io/contrast-security-oss/agent-operator-images/agent-dotnet-framework@sha256:81d535a7a587695de5c955219c050cc16838262fd3674b43062a829d99ec7d06
java: ghcr.io/contrast-security-oss/agent-operator-images/agent-java@sha256:f43c2dee4dd267779c30f6e101f557a5d9935f83f6ac70f682c3d26689c359b6
nodejs: ghcr.io/contrast-security-oss/agent-operator-images/agent-nodejs@sha256:22aa2f0ecd93cb9ff7c7fbdafebb599489fb1c5c0b7ea04339e2336af9f78283
php: ghcr.io/contrast-security-oss/agent-operator-images/agent-php@sha256:d576e0a19b76415dd897fbdb3000b908bc870333ee205fb5c82f7830255e8509
python: ghcr.io/contrast-security-oss/agent-operator-images/agent-python@sha256:00e6fa3f2b4d9de0868d0f9e66b13981ed08490f7a1220191639904f23aa66d4