chore: Fix typo in 'Suggest a new feature' url (#988)

Author: claremacrae

.github/ISSUE_TEMPLATE/config.yml

@@ -1,7 +1,7 @@
 blank_issues_enabled: true
 contact_links:
   - name: Suggest a new feature
-    url: hhttps://github.com/obsidian-tasks-group/obsidian-tasks/discussions/new?category=ideas
+    url: https://github.com/obsidian-tasks-group/obsidian-tasks/discussions/new?category=ideas
     about: Request a new feature or improvement in the Tasks plugin. Please search existing Ideas first, and up-vote, to avoid Duplicates.
   - name: Ask a question
     url: https://github.com/obsidian-tasks-group/obsidian-tasks/discussions/new?category=q-a