Update issue templates

.github/ISSUE_TEMPLATE/bug_report.md

@@ -3,7 +3,7 @@ name: Bug Report
 about: Create a bug report affecting the library
 ---
 
-<!-- WARNING: Ignoring this template could lead to the issue being closed as incomplete -->
+<!-- WARNING: Ignoring this template could lead to the issue being closed as invalid -->
 
 ## Checklist
 - [ ] I am sure the error is coming from Pyrogram's code and not elsewhere.
@@ -11,10 +11,10 @@ about: Create a bug report affecting the library
 - [ ] I ran `pip3 install -U https://github.com/pyrogram/pyrogram/archive/master.zip` and reproduced the issue using the latest development version.
 
 ## Description
-A clear and concise description of the problem.
+A **clear** and **concise** description of the problem. Code snippets must be formatted properly.
 
 ## Steps to Reproduce
 [A minimal, reproducible example](https://stackoverflow.com/help/minimal-reproducible-example).
 
 ## Traceback
-The full traceback (if applicable).
+The full traceback (if applicable).

.github/ISSUE_TEMPLATE/feature_request.md

@@ -4,7 +4,7 @@ about: Suggest ideas, new features or enhancements
 labels: "enhancement"
 ---
 
-<!-- WARNING: Ignoring this template could lead to the issue being closed as incomplete -->
+<!-- WARNING: Ignoring this template could lead to the issue being closed as invalid -->
 
 ## Checklist
 - [ ] I believe the idea is awesome and would benefit the library.

.github/ISSUE_TEMPLATE/question.md

@@ -2,10 +2,10 @@
 name: Ask Question
 about: Ask a Pyrogram related question
 title: For Q&A purposes, please read this template body
-labels: "question"
+labels: "invalid"
 ---
 
-<!-- WARNING: Ignoring this template could lead to the issue being closed as incomplete -->
+<!-- WARNING: Ignoring this template could lead to the issue being closed as invalid -->
 
 # Important
 This place is for issues about Pyrogram, it's **not a forum**.