Fix some typos in internal/pkg/config/config.example.yaml (#764)

Reviewed-on: https://gitea.com/gitea/act_runner/pulls/764
Reviewed-by: techknowlogick <techknowlogick@noreply.gitea.com>
Co-authored-by: DavidToneian <davidtoneian@noreply.gitea.com>
Co-committed-by: DavidToneian <davidtoneian@noreply.gitea.com>

internal/pkg/config/config.example.yaml

@@ -21,7 +21,7 @@ runner:
   env_file: .env
   # The timeout for a job to be finished.
   # Please note that the Gitea instance also has a timeout (3h by default) for the job.
-  # So the job could be stopped by the Gitea instance if it's timeout is shorter than this.
+  # So the job could be stopped by the Gitea instance if its timeout is shorter than this.
   timeout: 3h
   # The timeout for the runner to wait for running jobs to finish when shutting down.
   # Any running jobs that haven't finished after this timeout will be cancelled.
@@ -39,7 +39,7 @@ runner:
   github_mirror: ''
   # The labels of a runner are used to determine which jobs the runner can run, and how to run them.
   # Like: "macos-arm64:host" or "ubuntu-latest:docker://docker.gitea.com/runner-images:ubuntu-latest"
-  # Find more images provided by Gitea at https://gitea.com/docker.gitea.com/runner-images .
+  # Find more images provided by Gitea at https://gitea.com/gitea/runner-images .
   # If it's empty when registering, it will ask for inputting labels.
   # If it's empty when execute `daemon`, will use labels in `.runner` file.
   labels:
@@ -72,7 +72,7 @@ container:
   network: ""
   # Whether to use privileged mode or not when launching task containers (privileged mode is required for Docker-in-Docker).
   privileged: false
-  # And other options to be used when the container is started (eg, --add-host=my.gitea.url:host-gateway).
+  # Any other options to be used when the container is started (e.g., --add-host=my.gitea.url:host-gateway).
   options:
   # The parent directory of a job's working directory.
   # NOTE: There is no need to add the first '/' of the path as act_runner will add it automatically. 
@@ -90,7 +90,7 @@ container:
   # valid_volumes:
   #   - '**'
   valid_volumes: []
-  # overrides the docker client host with the specified one.
+  # Overrides the docker client host with the specified one.
   # If it's empty, act_runner will find an available docker host automatically.
   # If it's "-", act_runner will find an available docker host automatically, but the docker host won't be mounted to the job containers and service containers.
   # If it's not empty or "-", the specified docker host will be used. An error will be returned if it doesn't work.