chore(deps): update ghcr.io/semgrep/mcp docker tag to v0.8.1

Author: renovate[bot]

registry/semgrep/spec.yaml

@@ -36,7 +36,7 @@ tags:
   - semgrep
   - ast
   - code-analysis
-image: ghcr.io/semgrep/mcp:0.7.2
+image: ghcr.io/semgrep/mcp:0.8.1
 permissions:
   network:
     outbound: