chore: use docker.gitea.com registry URLs (#814)

Due to ratelimits

Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/814
Reviewed-by: pat-s <pat-s@noreply.gitea.com>
Co-authored-by: techknowlogick <techknowlogick@gitea.com>
Co-committed-by: techknowlogick <techknowlogick@gitea.com>

unittests/helm/act_runner/job.yaml

@@ -27,7 +27,7 @@ tests:
           name: gitea-unittests-actions-token-job
       - equal:
           path: spec.template.spec.containers[0].image
-          value: "gitea/gitea:1.19.3-rootless"
+          value: "docker.gitea.com/gitea:1.19.3-rootless"
   - it: tag override
     template: templates/gitea/act_runner/job.yaml
     set:
@@ -44,7 +44,7 @@ tests:
     asserts:
       - equal:
           path: spec.template.spec.containers[0].image
-          value: "gitea/gitea:1.19.4-rootless"
+          value: "docker.gitea.com/gitea:1.19.4-rootless"
       - equal:
           path: spec.template.spec.containers[1].image
           value: "bitnami/kubectl:1.29.0"