Update workflows *.yaml

.gitea/workflows/004_checkout_example.yaml

@@ -0,0 +1,19 @@
+name: Checkout Example
+
+on:
+  workflow_dispatch:
+
+jobs:
+  demo-checkout:
+    runs-on: ubuntu-latest
+    steps:
+      - name: List space
+        # workspace is a special variable containing the path to the working directory 
+        # on the runner machine. Github is a context which we can access in expression ${{}}. 
+        run: ls -la ${{ github.workspace }}
+      
+      - name: Checkout source code 
+        uses: actions/checkout@v4 # use github action from repo github.com/actions/checkout
+      
+      - name: List space again
+        run: ls -la ${{ github.workspace }}