Update flaky-test.yml descriptions (#3138)

Author: orestisfl

.github/ISSUE_TEMPLATE/flaky-test.yml

@@ -12,18 +12,18 @@ body:
       required: true
 
   - type: input
-    id: link
+    id: links
     attributes:
-      label: "Link"
-      description: "Link to file/line number in GitHub."
+      label: "Links"
+      description: "Links to failing GitHub Action and file/line number in GitHub"
     validations:
       required: true
 
   - type: input
     id: branch
     attributes:
-      label: "Branch"
-      description: "Git branch the test was seen in. If a PR, the branch the PR was based off."
+      label: "Branch / PR"
+      description: "Git branch or PR the test was seen in."
     validations:
       required: true