Fix pyright CI job (#11689)

AlexWaygood · srittau · web-flow · commit b0218af146e3 · 2024-04-01T14:17:31.000+01:00
Co-authored-by: Sebastian Rittau &lt;srittau@rittau.biz&gt;
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
@@ -123,7 +123,9 @@ jobs:
           if [ -n "$DEPENDENCIES" ]; then
             source .venv/bin/activate
             echo "Installing packages: $DEPENDENCIES"
-            uv pip install $DEPENDENCIES
+            # https://github.com/python/typeshed/issues/11688
+            echo "Pillow<10.3" > constraints.txt
+            uv pip install -c constraints.txt $DEPENDENCIES
           fi
       - name: Activate the isolated venv for the rest of the job
         run: echo "$PWD/.venv/bin" >> $GITHUB_PATH
