delete all duplicate empty blanks

Signed-off-by: Xiang Dai <764524258@qq.com>

.github/ISSUE_TEMPLATE/support.md

@@ -5,7 +5,7 @@ labels: triage/support
 
 ---
 
-<!-- 
+<!--
 STOP -- PLEASE READ!
 
 GitHub is not the right place for support requests.

.github/PULL_REQUEST_TEMPLATE.md

@@ -24,7 +24,7 @@ https://git.k8s.io/community/contributors/devel/release.md#issue-kind-label
 **What this PR does / why we need it**:
 
 **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`_*
@@ -34,7 +34,7 @@ Fixes #
 **Special notes for your reviewer**:
 
 **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:
 Enter your extended release note in the block below. If the PR requires additional action from users switching to the new release, include the string "action required".