bug-report,feature-request: Fix links to "About this Handbook".

Author: flexibeast

.github/ISSUE_TEMPLATE/bug-report.md

@@ -7,6 +7,6 @@ assignees: ''
 
 ---
 
-*Before opening an issue, please be sure to check [what content is suitable for the Handbook](https://docs.voidlinux.org/about-handbook/index.html).*
+*Before opening an issue, please be sure to check [what content is suitable for the Handbook](https://docs.voidlinux.org/about/about-this-handbook.html).*
 
 We prioritise issues about information specific to Void, and try to avoid duplicating information already available elsewhere (e.g. on the Arch wiki).

.github/ISSUE_TEMPLATE/feature-request.md

@@ -7,6 +7,6 @@ assignees: ''
 
 ---
 
-*Before opening a request, please be sure to check [what content is suitable for the Handbook](https://docs.voidlinux.org/about-handbook/index.html).*
+*Before opening a request, please be sure to check [what content is suitable for the Handbook](https://docs.voidlinux.org/about/about-this-handbook.html).*
 
 We prioritise requests for information specific to Void, and try to avoid duplicating information already available elsewhere (e.g. on the Arch wiki).