Fix GitHub labels in release changelog generator script and PR template (#6916)

* Rename 'kind/code-refactoring' label into 'area/refactoring' in changelog generator script

* Update GitHub PR template

.github/PULL_REQUEST_TEMPLATE.md

@@ -17,11 +17,11 @@ If you are pushing a change to documentation, please read: https://github.com/re
 Add one of the following kinds:
 /kind bug
 /kind feature
-/kind code-refactoring
 
-Additionally, add one of the following areas if applicable:
+Additionally, add one or more [`area/*` label(s)](https://github.com/redhat-developer/odo/labels?q=area%2F) if applicable. For example:
 /area documentation
 /area testing
+/area refactoring
 
 Feel free to use other [labels](https://github.com/redhat-developer/odo/labels) as needed. However one of the above labels must be present or the PR will not be reviewed. This instruction is for reviewers as well.
 -->

scripts/changelog-script.sh

@@ -62,7 +62,7 @@ $RUN_GITHUB_CHANGELOG_GENERATOR \
 --enhancement-labels "kind/feature" \
 --bugs-label "**Bugs:**" \
 --bug-labels "kind/bug" \
---add-sections '{"documentation":{"prefix":"**Documentation:**","labels":["area/documentation"]}, "tests": {"prefix": "**Testing/CI:**", "labels": ["kind/tests"]}, "cleanup": {"prefix": "**Cleanup/Refactor:**", "labels": ["kind/code-refactoring"]}}'
+--add-sections '{"documentation":{"prefix":"**Documentation:**","labels":["area/documentation"]}, "tests": {"prefix": "**Testing/CI:**", "labels": ["area/testing"]}, "cleanup": {"prefix": "**Cleanup/Refactor:**", "labels": ["area/refactoring"]}}'
 
 echo "---------------------------------------"
 cat release-changelog.md