fix: broken mysql8-migrations workflow due to python-xmlsec

The latest version of python-xmlsec is breaking the mysql8-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-migrations.yml

@@ -51,7 +51,7 @@ 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: |
         sudo /etc/init.d/mysql start