Merge pull request matplotlib#27275 from story645/tag-issue-template

MAINT: fix .yml in tag issue template

Author: ksunden

.github/ISSUE_TEMPLATE/tag_proposal.yml

@@ -23,4 +23,5 @@ body:
     id: solution
     attributes:
       label: Proposed solution
-      description: What should the tag be? All tags are in the format `subcategory: tag`
+      description: >
+        What should the tag be? All tags are in the format `subcategory: tag`