ci: improve test workflow and API efficiency

- Install `act_runner` using brew in the test workflow
- Add a command to output `act_runner` version

Signed-off-by: Bo-Yi Wu <appleboy.tw@gmail.com>

.gitea/workflows/test.yml

@@ -28,5 +28,7 @@ jobs:
           tea --version
           brew install gitea/gitea/gitea
           gitea --version
+          brew install gitea/gitea/act_runner
+          act_runner --version
   # TODO: test for arm
   # There is no arm image for homebrew/brew, and the image markkrj/homebrew-arm hasn't been updated for years