Try building on runners that are still available

Author: nattylinden

.github/workflows/ci.yaml

@@ -3,7 +3,7 @@ name: CI
 on:
   pull_request:
   push:
-    branches: [main]
+    branches: [main, natty/build]
     tags: [v*.*.*]
 
 jobs:
@@ -15,7 +15,7 @@ jobs:
       image: ${{ matrix.container-image }}
     env:
       PYTHON: ${{ matrix.python-version }}
-    runs-on: [ubuntu-20.04]
+    runs-on: ubuntu-latest
     strategy:
       # Finish the other builds even if one fails.
       fail-fast: false
@@ -24,6 +24,8 @@ jobs:
         include:
           - python-version: '2.7'
             container-image: python:2.7
+          - python-version: '3.7'
+            container-image: python:3.7
     steps:
       - uses: actions/checkout@v4
         with:
@@ -75,7 +77,7 @@ jobs:
     runs-on: [ubuntu-latest]
     permissions:
       id-token: write
-    if: github.event_name != 'pull_request'
+    if: false
     steps:
       - uses: actions/download-artifact@v4