Merge pull request #9590 from richardkchapman/new-template

HPCC-17012 Update Pull request template

Reviewed-by: Gavin Halliday <ghalliday@hpccsystems.com>

.github/PULL_REQUEST_TEMPLATE.md

@@ -28,6 +28,9 @@
 ## Checklist:
 - [ ] My code follows the code style of this project.
   - [ ] My code does not create any new warnings from compiler, build system, or lint.
+- [ ] The commit message is properly formatted and free of typos.
+  - [ ] The commit message title makes sense in a changelog, by itself.
+  - [ ] The commit is signed.
 - [ ] My change requires a change to the documentation.
   - [ ] I have updated the documentation accordingly, or...
   - [ ] I have created a JIRA ticket to update the documentation.