Update build.yml to run on ubuntu-22.04 instead of -latest

ubuntu-22.04 runner image does not have `/home/runner/.local`, which is crucial, but it is present in ubuntu-22.04.

.github/workflows/build.yml

@@ -73,30 +73,21 @@ jobs:
     needs: build
     runs-on: ubuntu-22.04
     steps:
-    - run: ls -la ~/
     - uses: actions/checkout@v4
-    - run: ls -la ~/
     - uses: actions/setup-python@v5
       with:
         python-version: '3.x'
-    - run: ls -la ~/
     - run: pip install . \
           git+https://github.com/silnrsi/{sldrtools#sldrtools,palaso-python#palaso} \
-          six
-
-    - run: ls -la ~/
+          six        
     - uses: actions/download-artifact@v4
       with:
         name: langtags
         path: pub
-
     # Test it.
-    - run: ls -la ~/
     - name: Test langtags
       id: langtags
       run: |
-        ls -l ~/.local/
-        ls -l ~/.local/*.cache
         python3 -m unittest tests.test_json tests.python.test_python tests.test_basic
         echo "need_commit=$(git diff -wU0 pub/langtags.json | grep '^+ ' | grep -v '\"date\":' | wc -l)" >> $GITHUB_OUTPUT
 #    - name: Commit built langtags