Update feedback.md (#2023)

Updating command for handbook feedback from "/handbook" to "/docs". I found that anytime a link to the handbook is mentioned in a comment, the "/handbook" in the URL triggers this workflow.

.github/ISSUE_TEMPLATE/feedback.md

@@ -13,10 +13,10 @@ You can see if similar feedback has already been reported by searching https://g
 
 ## Type of feedback
 <!--
-Please type the corresponding command that represents your feedback. It will be a slash (/) plus a word (dev, content, handbook) with no space in between. (Like /example)
+Please type the corresponding command that represents your feedback. It will be a slash (/) plus a word (dev, content, docs) with no space in between. (Like /example)
 Is your feedback reporting a bug or feature request for the Learn WordPress website? Type: / dev (with no space)
 Is your feedback about the content on Learn WordPress, such as reporting out-dated information? Type: / content (with no space)
-Is your feedback about the Training Team's documentation? Type: / handbook (with no space)
+Is your feedback about the Training Team's documentation? Type: / docs (with no space)
 -->
 
 ## Description