Issue template for documentation improvements (#1732)

The existing issue templates don't fit well for "the docs are not very good" and are too high friction.

This is intended as a very-low friction tool to provide the basis for more thorough docs PRs.

.github/ISSUE_TEMPLATE/bug_report.md

@@ -2,7 +2,7 @@
 name: Bug Report
 about: Report a bug to help us improve!
 title: ''
-labels: ''
+labels: bug, needs-triage
 assignees: ''
 ---
 

.github/ISSUE_TEMPLATE/docs_improvement.md

@@ -0,0 +1,13 @@
+---
+name: Docs Improvement
+about: Help us write better docs to catch common issues!
+title: ''
+labels: documentation, needs-triage
+assignees: ''
+---
+
+## How can Bevy's documentation be improved?
+
+Provide a link to the documentation and describe how it could be improved. In what ways is it incomplete, incorrect, or misleading?
+
+If you have suggestions on exactly what the new docs should say, feel free to include them here. Or alternatively, make the changes yourself and [create a pull request](https://bevyengine.org/learn/book/contributing/code/) instead.

.github/ISSUE_TEMPLATE/feature_request.md

@@ -2,7 +2,7 @@
 name: Feature Request
 about: Propose a new feature!
 title: ''
-labels: ''
+labels: enhancement, needs-triage
 assignees: ''
 ---