.github: update question.md template

Some other links in the question.md template for new issues
still had an older link, and inconsistent capitalisation.

This commit addresses those.

.github/ISSUE_TEMPLATE/question.md

@@ -9,6 +9,6 @@ recommend using our other community resources instead of asking here if you
 have a question.
 
 - Packer Guides: <https://developer.hashicorp.com/packer/guides>
-- Any other questions can be sent to the packer section of the HashiCorp
+- Any other questions can be sent to the Packer section of the HashiCorp
   forum: <https://discuss.hashicorp.com/c/packer>
-- Packer community links: <https://www.packer.io/community>
+- Packer Community: <https://developer.hashicorp.com/packer/docs/community-tools>