Improved GitHub issues layout

.github/ISSUE_TEMPLATE/bug_report.md

@@ -7,17 +7,17 @@ assignees: ''
 
 ---
 
-**Describe the bug**
+## Describe the bug
 (Describe the problem clearly and concisely.)
 
-**Expected behavior**
+### Expected behavior
 (Describe the expected behavior clearly and concisely.)
 
-**Actual behavior**
+### Actual behavior
 (Describe the actual behavior clearly and concisely.)
 
 
-**To Reproduce**
+## To Reproduce
 
 Link to a small reproducer (preferably a Maven project if the issue is not Gradle-specific).
 
@@ -28,21 +28,26 @@ Steps to reproduce the behavior:
 2. 
 3. 
 
-**Configuration**
+### Configuration
 ```properties
 # Add your application.properties here, if applicable.
 
 ```
 
-**Screenshots**
+### Screenshots
 (If applicable, add screenshots to help explain your problem.)
 
-**Environment (please complete the following information):**
- - Output of `uname -a` or `ver`: 
- - Output of `java -version`: 
- - GraalVM version (if different from Java): 
- - Quarkus version or git rev: 
- - Build tool (ie. output of `mvnw --version` or `gradlew --version`): 
+## Environment (please complete the following information):
 
-**Additional context**
+### Output of `uname -a` or `ver`
+
+### Output of `java -version`
+
+### GraalVM version (if different from Java)
+
+### Quarkus version or git rev
+
+### Build tool (ie. output of `mvnw --version` or `gradlew --version`)
+
+## Additional context
 (Add any other context about the problem here.)

.github/ISSUE_TEMPLATE/extension_proposal.md

@@ -7,16 +7,16 @@ assignees: ''
 
 ---
 
-**Describe the extension**
+## Describe the extension
 (Describe the extension clearly and concisely.)
 
 Interested in this extension, please +1 via the emoji/reaction feature of GitHub (top right).
 
-**Configuration suggestion**
+## Configuration suggestion
 ```properties
 # Add your application.properties here, if applicable.
 
 ```
 
-**Additional context**
+## Additional context
 (Add any other context about the proposal here.)

.github/ISSUE_TEMPLATE/feature_request.md

@@ -7,8 +7,8 @@ assignees: ''
 
 ---
 
-**Description**
+## Description
 (Describe the feature here.)
 
-**Implementation ideas**
+## Implementation ideas
 (If you have any implementation ideas, they can go here, however please note that all design change proposals should be posted to [the Quarkus developer mailing list](mailto:[email protected]) (or [the corresponding Google Group](https://groups.google.com/group/quarkus-dev); see [the decisions process document](https://github.com/quarkusio/quarkus/blob/master/DECISIONS.adoc) for more information).

.github/ISSUE_TEMPLATE/housekeeping.md

@@ -7,8 +7,8 @@ assignees: ''
 
 ---
 
-**Description**
+## Description
 (Describe the task here.)
 
-**Implementation ideas**
+## Implementation ideas
 (If you have any implementation ideas, they can go here.)