Update ci.yml

corrected the syntax error ```

Author: Kalpa08

.github/workflows/ci.yml

@@ -1,4 +1,3 @@
-```yaml
 name: Python Package CI
 
 on: [push, pull_request]
@@ -23,4 +22,3 @@ jobs:
     - name: Test with pytest
       run: |
         pytest
-        ```