Add general feedback section to workshop template

Added a section for general feedback in the workshop details template.

Author: anenadic

.github/ISSUE_TEMPLATE/workshop_details.yml

@@ -3,6 +3,10 @@ description: Share details, number of participants and feedback from a workshop
 title: "[Workshop details and feedback]: "
 labels: ["type:discussion"]
 body:
+  - type: markdown
+    attributes:
+      value: |
+        ## General feedback
   - type: markdown
     attributes:
       value: |