Update Cardano Node for SanchoNet environment

This commit updates the Cardano node version used within the Sanchonet
environment to `8.8.0-pre`, aligning with the latest implementation
enhancements and security updates. This change is reflected in the
`docker-compose.sanchonet.yml` file, ensuring that our infrastructure
remains at the forefront of technological advancements and maintains
compatibility with the evolving Cardano ecosystem.

Key Changes:
- The Cardano node image has been updated from `8.7.2` to `8.8.0-pre`, a
  pre-release version that incorporates the latest features and
improvements from the Cardano development team.

By staying updated with the latest versions of critical infrastructure
components like the Cardano node, we ensure that our platform remains
secure, efficient, and capable of leveraging the latest advancements in
the Cardano ecosystem. This proactive approach to infrastructure
management underscores our commitment to excellence and our dedication
to supporting the Cardano community with the most up-to-date and
reliable services possible.

scripts/govtool/docker-compose.sanchonet.yml

@@ -104,7 +104,7 @@ services:
     logging: *logging
 
   cardano-node:
-    image: ghcr.io/intersectmbo/cardano-node:8.7.2
+    image: ghcr.io/intersectmbo/cardano-node:8.8.0-pre
     entrypoint:
       - "cardano-node"
       - "run"