ci: Prevent running check, docs and test suites on tags

This doesn't make sense, because each tag is only pushed when those
pipelines have already passed. Thus, we can save time and avoid wasting
resources and don't run those again.

.github/workflows/ci.yaml

@@ -18,6 +18,7 @@ concurrency:
 jobs:
   check:
     name: Check
+    if: startsWith(github.ref, 'refs/heads/')
     uses: ./.github/workflows/check.yaml
     secrets:
       CACHIX_AUTH_TOKEN: ${{ secrets.CACHIX_AUTH_TOKEN }}
@@ -25,6 +26,7 @@ jobs:
 
   docs:
     name: Docs
+    if: startsWith(github.ref, 'refs/heads/')
     uses: ./.github/workflows/docs.yaml
     secrets:
       CACHIX_AUTH_TOKEN: ${{ secrets.CACHIX_AUTH_TOKEN }}
@@ -32,6 +34,7 @@ jobs:
 
   test:
     name: Test
+    if: startsWith(github.ref, 'refs/heads/')
     uses: ./.github/workflows/test.yaml
     secrets:
       CACHIX_AUTH_TOKEN: ${{ secrets.CACHIX_AUTH_TOKEN }}
@@ -147,8 +150,6 @@ jobs:
     name: Release / Prepare
     if: |
       startsWith(github.ref, 'refs/tags/') &&
-      needs.docs.result == 'success' &&
-      needs.test.result == 'success' &&
       needs.build.result == 'success' &&
       (needs.arm.result == 'skipped' || success())
     runs-on: ubuntu-22.04