ci: bump validate-go-project reusable workflow to v2.3.4

Update reference from v2.3.0 to v2.3.4 which switches from hardcoded
go-version: 1.26.1 to go-version-file: go.mod, allowing the workflow to
use the Go version required by the project's go.mod (now 1.26.2 due to
github.com/siderolabs/omni/client v1.6.5).

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: Copilot

.github/workflows/ci.yaml

@@ -207,7 +207,7 @@ jobs:
   ci-go:
     name: ✅ Validate Go Project
     if: github.event_name == 'push' && github.ref == 'refs/heads/main'
-    uses: devantler-tech/reusable-workflows/.github/workflows/validate-go-project.yaml@c46f75962deb2dab6619de8a379b47b929f40d15 # v2.3.0
+    uses: devantler-tech/reusable-workflows/.github/workflows/validate-go-project.yaml@afd34443d79480ef3f114138b558265a21ac8f13 # v2.3.4
     permissions:
       contents: write
       issues: write