Fix unittests (#434)

Unclear why it only appeared now and not earlier.

Co-authored-by: justusbunsi <sk.bunsenbrenner@gmail.com>
Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/434
Reviewed-by: justusbunsi <justusbunsi@noreply.gitea.io>
Co-authored-by: pat-s <patrick.schratz@gmail.com>
Co-committed-by: pat-s <patrick.schratz@gmail.com>

unittests/init/init_directory_structure.sh.yaml

@@ -8,6 +8,10 @@ tests:
   - it: runs gpg in batch mode
     set:
       signing.enabled: true
+      signing.privateKey: |-
+        -----BEGIN PGP PRIVATE KEY BLOCK-----
+        {placeholder}
+        -----END PGP PRIVATE KEY BLOCK-----
     asserts:
       - equal:
           path: stringData["configure_gpg_environment.sh"]
@@ -38,6 +42,10 @@ tests:
   - it: adds gpg script block for enabled signing
     set:
       signing.enabled: true
+      signing.privateKey: |-
+        -----BEGIN PGP PRIVATE KEY BLOCK-----
+        {placeholder}
+        -----END PGP PRIVATE KEY BLOCK-----
     asserts:
       - equal:
           path: stringData["init_directory_structure.sh"]