[github] add validations to bug and feature request templates

Author: david-lev

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -13,13 +13,15 @@ body:
       label: Short summary
       description: One-line summary of the bug
       placeholder: e.g. Sending a message fails with 500
+    validations:
       required: true
   - type: textarea
     id: steps
     attributes:
       label: Steps to reproduce
       description: Provide step-by-step instructions to reproduce the bug
       placeholder: 1) ...\n2) ...\n3) ...
+    validations:
       required: true
   - type: textarea
     id: expected

.github/ISSUE_TEMPLATE/feature_request.yml

@@ -11,12 +11,14 @@ body:
     id: summary
     attributes:
       label: Short summary
+    validations:
       required: true
   - type: textarea
     id: problem
     attributes:
       label: Problem to solve
       description: Describe the problem or pain point this feature would address
+    validations:
       required: true
   - type: textarea
     id: solution