docs(community): use absolute link to CoC instead of relative (#4732)

* docs(community): use absolute link to CoC instead of relative

- the relative link made it so that if you happen to land on https://wails.io/community-guide/ (with a trailing slash), it would take you to https://wails.io/community-guide/coc, which 404s
  - if you were at https://wails.io/community-guide (no trailing slash), it was fine.
  - use an absolute link so that it works the same regardless of the trailing slash or not

* add changelog entry per PR template

---------

Co-authored-by: Lea Anthony <lea.anthony@gmail.com>

Author: agilgur5

website/src/pages/changelog.mdx

@@ -16,6 +16,7 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ### Fixed
 
+- Fixed link to CoC in Community Guide when there was a trailing slash by @agilgur5 in [#4732](https://github.com/wailsapp/wails/pull/4732)
 - Fixed indentation in "How does it work?" page by @agilgur5 in [#4733](https://github.com/wailsapp/wails/pull/4733)
 
 ## v2.11.0 - 2025-11-08

website/src/pages/community-guide.mdx

@@ -6,7 +6,7 @@ The number of Wails users is growing at an incredible rate, and if you're readin
 
 ### Code of Conduct
 
-This [Code of Conduct](./coc) is an easy guide to develop the technical communities in which we participate.
+This [Code of Conduct](/coc) is an easy guide to develop the technical communities in which we participate.
 
 ### Stay in the Know