⬆️ Updates actions/checkout action to v2.7.0 (#28)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

.github/workflows/versioning.yml

@@ -31,7 +31,7 @@ jobs:
       #############################
       # Check out the latest code #
       #############################
-      - uses: actions/checkout@v2.3.4
+      - uses: actions/checkout@v2.7.0
 
       ######################
       # Run the tag action #