fix: fix links and use headers

.github/ISSUE_TEMPLATE/bug_report.md

@@ -7,10 +7,12 @@ assignees: ''
 
 ---
 
-**Describe the bug**
+### Describe the bug
+
 A clear and concise description of what the bug is.
 
-**Setup**
+### Setup
+
 Please complete the following information along with version numbers, if applicable.
  - OS [e.g. Ubuntu, macOS]
  - Shell [e.g. zsh, fish]
@@ -21,26 +23,31 @@ Please complete the following information along with version numbers, if applica
 `UTF-8` encoding. Please check your locale (`locale` on POSIX systems) to
 see what encoding is being used by your system.*
 
-**To Reproduce**
+### To Reproduce
+
 Steps to reproduce the behavior:
 1. Go to '...'
 2. Click on '....'
 3. Scroll down to '....'
 4. See error
 
-**Source Code**
-Please include a [minimum reproducible example][writing-examples] to reproduce the behavior.
+### Source Code
+
+Please include a [minimum reproducible example][writing-example] to reproduce the behavior.
 
 Please paste your example as a code block on the issue. Do not link to an external project. Your example should fit in a single file. Take a look at [Bubble Tea examples][bubbletea-example] for an idea on writing a small, but runnable program.
 
 [bubbletea-example]: https://github.com/charmbracelet/bubbletea/tree/main/examples
 [writing-example]: https://stackoverflow.com/help/minimal-reproducible-example
 
-**Expected behavior**
+### Expected behavior
+
 A clear and concise description of what you expected to happen.
 
-**Screenshots**
+### Screenshots
+
 Add screenshots to help explain your problem.
 
-**Additional context**
+### Additional context
+
 Add any other context about the problem here.