Avoid a bug in the new release of nox

Author: pfmoore

.github/workflows/check.yml

@@ -13,7 +13,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-python@v5
-    - run: pip install nox
+    - run: pip install nox!=2025.5.1
 
     - run: nox -s generate
     - name: Check regenerated scripts vs what is generated by automation.
@@ -25,7 +25,7 @@ jobs:
     steps:
     - uses: actions/checkout@v4
     - uses: actions/setup-python@v5
-    - run: pip install nox
+    - run: pip install nox!=2025.5.1
 
     # Install supported Python versions. Keep in sync with noxfile.py as
     # much as possible, however, GitHub Actions eventually drops support