ci: fix notification tasks

.gitea/workflows/build.yaml

@@ -68,14 +68,15 @@ jobs:
           tags: "registry.mgrote.net/${{ steps.meta.outputs.REPO_NAME }}:latest,registry.mgrote.net/${{ steps.meta.outputs.REPO_NAME }}:${{ steps.extract_branch.outputs.REPO_BRANCH }}"
       - name: Send notification
         uses: dawidd6/action-send-mail@v3
-        if: always()
+        if: failure()
         with:
           connection_url: smtp://docker10.mgrote.net:1025
           secure: false
           ignore_cert: true
           to: michael.grote@posteo.de
           from: Gitea Actions <gitea@mgrote.net>
-          subject: "CI ${{ job.status }} in ${{ env.GITHUB_REPOSITORY }}"
+          subject: "CI ${{ job.status }} in ${{ github.repository }}"
           body: |
-            Repo: ${{ env.GITHUB_REPOSITORY }}
+            Repo: ${{ github.repository }}
+            Job: ${{ github.action }}
             Status: ${{ job.status }}