Prepare for next release, update github references and tweak MR template.

.gitlab/merge_request_templates/DEFAULT.md

@@ -4,7 +4,7 @@ Before making a pull request
 - [ ] Run all linters (make lint)
 - [ ] Run all tests (make test)
 - [ ] Update the changelog appropriately
-- [ ] If making a release, update code.json, versionNumber and metadataLastUpdated.
+- [ ] If making a release, update code.json metadataLastUpdated and bump CHANGELOG.md to next version.
 
 Description
 -----------

code.json

@@ -39,7 +39,7 @@
       "email": "mbucknell@usgs.gov"
     },
     "date": {
-      "metadataLastUpdated": "2022-06-10"
+      "metadataLastUpdated": "2022-07-20"
     }
   }
 ]