extend pr template with note on karpenter k8s settings

Signed-off-by: Gavin Inglis <[email protected]>

Author: ginglis13

.github/pull_request_template.md

@@ -0,0 +1,9 @@
+*Issue #, if available:*
+
+*Description of changes:*
+
+*Does this change affect `settings.kubernetes`?*
+- [ ] Yes, and I opened a PR to github.com/aws/karpenter-provider-aws to add the setting to Karpenter:
+- [x] No
+
+By submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.