Group GitHub Actions updates in Renovate (#375)

Signed-off-by: Dan Barr <6922515+danbarr@users.noreply.github.com>
Co-authored-by: Dan Barr <6922515+danbarr@users.noreply.github.com>

Author: danbarr

renovate.json

@@ -45,7 +45,8 @@
       "matchManagers": ["github-actions"],
       "minimumReleaseAge": "3 days",
       "internalChecksFilter": "strict",
-      "prCreation": "not-pending"
+      "prCreation": "not-pending",
+      "groupName": "GitHub Actions"
     },
     {
       "enabled": false,