Add labels to issues automatically via templates.

[skip ci]

.github/ISSUE_TEMPLATE/BC_Break.md

 ---
 name: 💥 BC Break
 about: Have you encountered an issue during an upgrade? 💣
+labels: bc break
 ---
 
 <!--
@@ -9,7 +10,7 @@ Before reporting a BC break, please consult the changelog and wiki entry for the
 - https://github.com/php-telegram-bot/core/wiki/Breaking-backwards-compatibility
 -->
 
-### BC Break Report
+### 💥 BC Break Report
 
 <--
 ❗ NEVER put your Telegram API key or any other private details here. (like passwords, user IDs, etc.)

.github/ISSUE_TEMPLATE/Bug.md

 ---
 name: 🐞 Bug Report
 about: Something is broken? 🔨
+labels: bug
 ---
 
-### Bug Report
+### 🐞 Bug Report
 
 <--
 ❗ NEVER put your Telegram API key or any other private details here. (like passwords, user IDs, etc.)
@@ -29,7 +30,7 @@ Substitute them like <API_KEY> or <USER_ID> etc.
 
 <!-- Provide a summary describing the problem you are experiencing. -->
 
-### Current behaviour
+#### Current behaviour
 
 <!-- What is the current (buggy) behaviour? -->
 

.github/ISSUE_TEMPLATE/Feature_Request.md

 ---
 name: 🎉 Feature Request
 about: You have a neat idea that should be implemented? 🎩
+labels: feature request
 ---
 
-### Feature Request
+### 🎉 Feature Request
 
 #### Summary
 

.github/ISSUE_TEMPLATE/Support_Question.md

 ---
 name: ❓ Support Question
 about: Have a problem that you can't figure out? 🤔
+labels: question
 ---
 
-### Support Question
+### ❓ Support Question
 
 <!--
 Before asking a question here, please try asking in the support group first.

CHANGELOG.md

@@ -7,6 +7,7 @@ Exclamation symbols (:exclamation:) note something of importance e.g. breaking c
 ### Notes
 - [:ledger: View file changes][Unreleased]
 ### Added
+- Issue labels set automatically via templates. 
 ### Changed
 - Logging only updates or only debug/errors is now possible.
 ### Deprecated