chore: fix duplicated names in github templates

Duplicated names in the yml embedded in the github templates causes them
to not render into the issue list while navigating the github web
interface.

This changes the name of the 2_enhancement_request.md file to fix the
issue.

Author: nymius

.github/ISSUE_TEMPLATE/1_bug_report.md

@@ -4,7 +4,6 @@ about: Create a report to help us improve
 title: ''
 labels: 'bug'
 assignees: ''
-
 ---
 
 **Describe the bug**  

.github/ISSUE_TEMPLATE/2_enhancement_request.md

@@ -1,26 +1,16 @@
 ---
-name: Bug report
-about: Create a report to help us improve
+name: Enhancement request
+about: Request a new feature or change to an existing feature
 title: ''
-labels: 'bug'
+labels: 'enhancement'
 assignees: ''
-
 ---
 
-**Describe the bug**  
-<!-- A clear and concise description of what the bug is. -->
-
-**To Reproduce**  
-<!-- Steps or code to reproduce the behavior. -->
-
-**Expected behavior**  
-<!-- A clear and concise description of what you expected to happen. -->
+**Describe the enhancement**
+<!-- A clear and concise description of what you would like added or changed. -->
 
-**Build environment**  
- - Tag/commit: <!-- e.g. v0.13.0, 3a07614 --> 
- - OS+version: <!-- e.g. ubuntu 20.04.01, macOS 12.0.1, windows -->  
- - Rust/Cargo version: <!-- e.g. 1.56.0 --> 
- - Rust/Cargo target: <!-- e.g. x86_64-apple-darwin, x86_64-unknown-linux-gnu, etc. -->  
+**Use case**
+<!-- Tell us how you or others will use this new feature or change to an existing feature. -->
 
-**Additional context**  
-<!-- Add any other context about the problem here. --> 
+**Additional context**
+<!-- Add any other context about the enhancement here. -->

.github/ISSUE_TEMPLATE/3_minor_release.md

@@ -4,7 +4,6 @@ about: Create a new minor release [for release managers only]
 title: 'Release MAJOR.MINOR+1.0'
 labels: 'release'
 assignees: ''
-
 ---
 
 ## Create a new minor release

.github/ISSUE_TEMPLATE/4_patch_release.md

@@ -4,7 +4,6 @@ about: Create a new patch release [for release managers only]
 title: 'Release MAJOR.MINOR.PATCH+1'
 labels: 'release'
 assignees: ''
-
 ---
 
 ## Create a new release