Use markdown headers instead of bold text for PR template

The usage of markdown headers will provide a more eye-friendly
formatting without having a need to add additional newlines to the PR.
This is reasoned by the GitHub markdown parser which adds additional
space before and after the header.

Signed-off-by: Sascha Grunert <[email protected]>

Author: saschagrunert

.github/ISSUE_TEMPLATE/bug-report.md

@@ -11,15 +11,15 @@ If the matter is security related, please disclose it privately via https://kube
 -->
 
 
-**What happened**:
+#### What happened:
 
-**What you expected to happen**:
+#### What you expected to happen:
 
-**How to reproduce it (as minimally and precisely as possible)**:
+#### How to reproduce it (as minimally and precisely as possible):
 
-**Anything else we need to know?**:
+#### Anything else we need to know?:
 
-**Environment**:
+#### Environment:
 - Kubernetes version (use `kubectl version`):
 - Cloud provider or hardware configuration:
 - OS (e.g: `cat /etc/os-release`):

.github/ISSUE_TEMPLATE/enhancement.md

@@ -6,6 +6,6 @@ labels: kind/feature
 ---
 <!-- Please only use this template for submitting enhancement requests -->
 
-**What would you like to be added**:
+#### What would you like to be added:
 
-**Why is this needed**:
+#### Why is this needed:

.github/ISSUE_TEMPLATE/failing-test.md

@@ -7,14 +7,14 @@ labels: kind/failing-test
 
 <!-- Please only use this template for submitting reports about continuously failing tests or jobs in Kubernetes CI -->
 
-**Which jobs are failing**:
+#### Which jobs are failing:
 
-**Which test(s) are failing**:
+#### Which test(s) are failing:
 
-**Since when has it been failing**:
+#### Since when has it been failing:
 
-**Testgrid link**:
+#### Testgrid link:
 
-**Reason for failure**:
+#### Reason for failure:
 
-**Anything else we need to know**:
+#### Anything else we need to know:

.github/ISSUE_TEMPLATE/flaking-test.md

@@ -7,16 +7,16 @@ labels: kind/flake
 
 <!-- Please only use this template for submitting reports about flaky tests or jobs (pass or fail with no underlying change in code) in Kubernetes CI -->
 
-**Which jobs are flaking**:
+#### Which jobs are flaking:
 
-**Which test(s) are flaking**:
+#### Which test(s) are flaking:
 
-**Testgrid link**:
+#### Testgrid link:
 
-**Reason for failure**:
+#### Reason for failure:
 
-**Anything else we need to know**:
+#### Anything else we need to know:
 - links to go.k8s.io/triage appreciated
 - links to specific failures in spyglass appreciated
 
-<!-- Please see the deflaking doc (https://github.com/kubernetes/community/blob/master/contributors/devel/sig-testing/flaky-tests.md) for more guidance! -->
+<!-- Please see the deflaking doc (https://github.com/kubernetes/community/blob/master/contributors/devel/sig-testing/flaky-tests.md) for more guidance! -->

.github/PULL_REQUEST_TEMPLATE.md

@@ -8,7 +8,7 @@ https://git.k8s.io/community/contributors/devel/sig-release/release.md#issuepr-k
 5. If the PR is unfinished, see how to mark it: https://git.k8s.io/community/contributors/guide/pull-requests.md#marking-unfinished-pull-requests
 -->
 
-**What type of PR is this?**
+#### What type of PR is this?
 
 <!--
 Add one of the following kinds:
@@ -26,19 +26,19 @@ Optionally add one or more of the following kinds if applicable:
 /kind regression
 -->
 
-**What this PR does / why we need it**:
+#### What this PR does / why we need it:
 
-**Which issue(s) this PR fixes**:
+#### Which issue(s) this PR fixes:
 <!--
 *Automatically closes linked issue when PR is merged.
 Usage: `Fixes #<issue number>`, or `Fixes (paste link of issue)`.
 _If PR is about `failing-tests or flakes`, please post the related issues/tests in a comment and do not use `Fixes`_*
 -->
 Fixes #
 
-**Special notes for your reviewer**:
+#### Special notes for your reviewer:
 
-**Does this PR introduce a user-facing change?**:
+#### Does this PR introduce a user-facing change?
 <!--
 If no, just write "NONE" in the release-note block below.
 If yes, a release note is required:
@@ -50,7 +50,7 @@ For more information on release notes see: https://git.k8s.io/community/contribu
 
 ```
 
-**Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.**:
+#### Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:
 
 <!--
 This section can be blank if this pull request does not require a release note.