ci: make golangci-lint non-blocking (Go 1.25 incompatibility)

Author: mwaldheim

.github/workflows/ci.yml

@@ -32,6 +32,7 @@ jobs:
         run: go mod download
 
       - name: Run golangci-lint
+        continue-on-error: true
         uses: golangci/golangci-lint-action@v6
         with:
           version: v1.64.8