(build) Make use of new GRM features

Will test these out while doing the release of 0.19.0

Author: gep13

GitReleaseManager.yaml

@@ -19,8 +19,10 @@ create:
     include-sha-section: true
     sha-section-heading: "SHA256 Hashes of the release artifacts"
     sha-section-line-format: "- `{1}\t{0}`"
+    include-contributors: true
 close:
   use-issue-comments: true
+  set-due-date: true
   issue-comment: |-
     :tada: This issue has been resolved in version {milestone} :tada: