[cleanup,docs] Minor fixes

Closes #2541, #2484

.github/ISSUE_TEMPLATE/1_broken_site.yml

@@ -1,4 +1,4 @@
-name: Broken site support
+name: Broken site
 description: Report broken or misfunctioning site
 labels: [triage, site-bug]
 body:

.github/ISSUE_TEMPLATE/5_feature_request.yml

@@ -11,6 +11,8 @@ body:
       options:
         - label: I'm reporting a feature request
           required: true
+        - label: I've looked through the [README](https://github.com/yt-dlp/yt-dlp#readme)
+          required: true
         - label: I've verified that I'm running yt-dlp version **2022.01.21**. ([update instructions](https://github.com/yt-dlp/yt-dlp#update))
           required: true
         - label: I've searched the [bugtracker](https://github.com/yt-dlp/yt-dlp/issues?q=) for similar issues including closed ones. DO NOT post duplicates

.github/ISSUE_TEMPLATE/6_question.yml

@@ -25,7 +25,8 @@ body:
         Ask your question in an arbitrary form.
         Please make sure it's worded well enough to be understood, see [is-the-description-of-the-issue-itself-sufficient](https://github.com/ytdl-org/youtube-dl#is-the-description-of-the-issue-itself-sufficient).
         Provide any additional information and as much context and examples as possible.
-        If your question contains "isn't working" or "can you add", this is most likely the wrong template
+        If your question contains "isn't working" or "can you add", this is most likely the wrong template.
+        If you are in doubt if this is the right template, use another template!
       placeholder: WRITE QUESTION HERE
     validations:
       required: true