Fix CI workflow - use proper checkout instead of wget

.gitea/workflows/ci.yml

@@ -6,16 +6,18 @@ jobs:
   test:
     runs-on: ubuntu-latest
     steps:
-      - name: Download repo
-        run: |
-          wget -q https://gitea.com/7000pctAUTO/json-to-openapi/archive/main.tar.gz -O repo.tar.gz
-          tar xzf repo.tar.gz
-          ls -la
+      - name: Checkout code
+        uses: actions/checkout@v4
+      
+      - name: Set up Python
+        uses: actions/setup-python@v5
+        with:
+          python-version: '3.x'
+      
       - name: Install
         run: |
-          cd json-to-openapi-main
           pip3 install -e . pytest
+      
       - name: Test
         run: |
-          cd json-to-openapi-main
           pytest tests/ -v