ci: skip releases for testing or documentation PRs

Add a condition to the release workflow to skip execution if the PR
is labeled with 'Kind/Testing' or 'Kind/Documentation'. This prevents
unnecessary releases for non-functional changes.

.gitea/workflows/release.yaml

@@ -8,7 +8,10 @@ on:
 
 jobs:
   release:
-    if: github.event.pull_request.merged == true
+    if: |
+      github.event.pull_request.merged == true &&
+      !contains(github.event.pull_request.labels.*.name, 'Kind/Testing') &&
+      !contains(github.event.pull_request.labels.*.name, 'Kind/Documentation')
     runs-on: ubuntu-latest
     steps:
       - name: Checkout code