fix: demo without emojis

content/post/hacking-on-gitea-actions.md

@@ -104,6 +104,29 @@ jobs:
 
 You can upload it as a file with the extension `.yaml` in the directory `.gitea/workflows/` of the repository, perhaps `.gitea/workflows/demo.yaml`. You may notice that this is almost copied from [Quickstart for GitHub Actions](https://docs.github.com/en/actions/quickstart), yes, Gitea Actions is designed to be compatible with GitHub Actions.
 
+Be careful, the demo file contains some emojis. Please make sure your database supports them, especially when using MySQL. If the charset is not `utf8mb4`, errors will occur, such as `Error 1366 (HY000): Incorrect string value: '\\xF0\\x9F\\x8E\\x89 T...' for column 'name' at row 1`. See [Database Preparation](https://docs.gitea.io/en-us/database-prep/#mysql). Alternatively, you can use this demo without emojis:
+
+```yaml
+name: Gitea Actions Demo
+run-name: ${{ gitea.actor }} is testing out Gitea Actions
+on: [push]
+jobs:
+  Explore-Gitea-Actions:
+    runs-on: ubuntu-latest
+    steps:
+      - run: echo "The job was automatically triggered by a ${{ gitea.event_name }} event."
+      - run: echo "This job is now running on a ${{ runner.os }} server hosted by Gitea!"
+      - run: echo "The name of your branch is ${{ gitea.ref }} and your repository is ${{ gitea.repository }}."
+      - name: Check out repository code
+        uses: actions/checkout@v3
+      - run: echo "The ${{ gitea.repository }} repository has been cloned to the runner."
+      - run: echo "The workflow is now ready to test your code on the runner."
+      - name: List files in the repository
+        run: |
+          ls ${{ gitea.workspace }}
+      - run: echo "This job's status is ${{ gitea.status }}."
+```
+
 The line `on: [push]` indicates that the workflow will be triggered when you push commits to this repository. However, when you upload the YAML file, it also pushes a commit, so you should see a new task in the Actions tab.
 
 ![view job](/demos/hacking-actions/view-job.png)