Fix checkov incompatibility with pycares 5.0.0

The lint terraform workflow action has stopped working due to an
incompatibility between checkov and pycares 5.0.0. This change pins
the pycares version to fix this.

Also update the version of checkov to be the version used in
forms-deploy.

Author: stephencdaly

.review_apps/requirements.txt

@@ -1,3 +1,6 @@
 # This is here exclusively to inform the version of Checkov we use.
 # We do not write anything in Python.
-checkov==3.2.369
+checkov==3.2.470
+# This has been added due to an incompatibility between checkov and the latest pycares version. This can be removed
+# when checkov updates their dependency to support 5.x versions of pycares.
+pycares<5.0.0