fix: broken mysql8-check-migrations workflow due to python-xmlsec (#613)

The latest version of python-xmlsec is breaking the mysql8-check-migrations Github action. See xmlsec/python-xmlsec#314.

The recommended course of action is to pin the version of python-xmlsec in the action.

.github/workflows/mysql8-check-migrations.yml

@@ -56,7 +56,8 @@ jobs:
         pip uninstall -y mysqlclient
         pip install --no-binary mysqlclient mysqlclient
         pip uninstall -y xmlsec
-        pip install --no-binary xmlsec xmlsec
+        pip install --no-binary xmlsec xmlsec==1.3.13
+
 
     - name: Initiate services
       run: |