chore(renovate): group bats framework dependencies (#844)

Related to https://gitea.com/gitea/helm-gitea/pulls/724#issuecomment-995049

Groups following updates:

- unittests/bash/bats
- unittests/bash/test_helper/bats-assert
- unittests/bash/test_helper/bats-mock
- unittests/bash/test_helper/bats-support

Reviewed-on: https://gitea.com/gitea/helm-gitea/pulls/844
Reviewed-by: pat-s <pat-s@noreply.gitea.com>
Co-authored-by: justusbunsi <sk.bunsenbrenner@gmail.com>
Co-committed-by: justusbunsi <sk.bunsenbrenner@gmail.com>

renovate.json5

@@ -57,6 +57,17 @@
         'digest',
       ],
     },
+    {
+      groupName: 'bats testing framework',
+      matchManagers: [
+        'git-submodules',
+      ],
+      matchUpdateTypes: [
+        'minor',
+        'patch',
+        'digest',
+      ],
+    },
     {
       groupName: 'workflow dependencies (minor & patch)',
       matchManagers: [