chore(docs): fix typos in issues/PR templates

Author: trivikr

.github/ISSUE_TEMPLATE/---bug-report.md

@@ -11,6 +11,7 @@ assignees: ''
 A clear and concise description of what the bug is.
 
 ## Your environment
+
 #### SDK version number
 `@aws-sdk/package-name@version`
 
@@ -22,6 +23,7 @@ Paste output of `npx envinfo --browsers` or `node -v` or `react-native -v`
 
 ## Steps to reproduce
 Please share code or minimal repo, and steps to reproduce the behavior.
+
 #### Observed behavior
 A clear and concise description of what happens.
 

.github/ISSUE_TEMPLATE/--documentation.md

@@ -12,6 +12,7 @@ A clear and concise description of what the issue is.
 
 ## Steps to reproduce
 Please share code or minimal repo if required, and steps to reproduce the behavior.
+
 #### Observed behavior
 A clear and concise description of what happens.
 

.github/pull_request_template.md

@@ -1,5 +1,5 @@
-### Issue #
-Refs: #, if available
+### Issue
+Issue number, if available
 
 ### Description
 What does this implement/fix? Explain your changes.