Fix duplicated names in github templates

.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