👽️ Pin flake8 to 5.0.4 in azure pipelines

Author: hayesall

azure-pipelines.yml

@@ -45,7 +45,7 @@ jobs:
         versionSpec: '3.9'
     - bash: |
         # Include pytest compatibility with mypy
-        pip install pytest flake8 mypy==0.782 black==22.3
+        pip install pytest flake8==5.0.4 mypy==0.782 black==22.3
       displayName: Install linters
     - bash: |
         black --check --diff .