Apply suggestions from code review

Co-authored-by: Aleksandr Statciuk <7253922+freearhey@users.noreply.github.com>
Co-authored-by: Dum4G <dumreview@gmail.com>

CONTRIBUTING.md

@@ -7,8 +7,8 @@
   - [Reporting of broken streams](#reporting-of-broken-streams)
   - [Finding of broken streams](#finding-of-broken-streams)
   - [Removing infrighting content](#removing-infrighting-content)
-- [Requirements](#requirements)
-- [Validation](#validation)
+- [Link Requirements](#link-requirements)
+- [Stream Validation](#stream-validation)
   - [How do I know if the stream is eligible?](#how-do-i-know-if-the-stream-is-eligible)
   - [Examples](#examples)
   - [Testing](#testing)
@@ -111,7 +111,7 @@ The channel will also be added to our [blocklist](https://github.com/iptv-org/da
 
 Please note that we only accept removal requests from channel owners and their official representatives, all other requests will be closed immediately.
 
-## Requirements
+## Link Requirements␍
 
 Before submitting new streams you should verify the following:
 
@@ -127,7 +127,7 @@ Before submitting new streams you should verify the following:
 - If possible please provide an adaptive link that covers every available resolution for a broadcast.
 - Follow the [Playlist Structure](#playlist-structure) in case of contributing by pull requests.
 
-## Validation
+## Stream Validation␍
 ### How do I know if the stream is eligible?
 
 Make sure you can find the origin of the broadcast using your favourite search engine or by following the domain of broadcast. If you used to see the channel under paywalls or subscription offers, it may likely be a copyright infringement. If you see a service with a probe period and available plans or you have found an unrecognizable link in someone else's playlist, it's likely to expire soon. Streams or services that have publicly available videoplayers are likely to perform publicly-intended broadcasts. Odds are your link will still be session protected and will only be available to you.