Update ci.yml

Author: sabianroberts

.github/workflows/ci.yml

@@ -2,13 +2,7 @@ name: Continuous Integration
 on: 
   workflow_dispatch:
   push:
-    branches:
-     - master
-     - 1.9-dev
   pull_request:
-    branches:
-     - master
-     - 1.9-dev
 jobs:
   test:
     strategy:
@@ -56,9 +50,9 @@ jobs:
           path: amxmodx
       # Setup Python for AMBuild
       - uses: actions/setup-python@v2
-        name: Setup Python 3.8
+        name: Setup Python 3.9
         with:
-          python-version: 3.8
+          python-version: 3.9
       - name: Install Python dependencies
         run: |
           python3 -m pip install --upgrade pip setuptools wheel