fix: Broken link and minor typo in Infra update (#2751)

data/changelog/infra/2024-10-02-updates.md

@@ -54,8 +54,9 @@ opam repository:
   locally, making it easier for package authors to identify and resolve issues
   before submitting to the repository.
 - We are [generating documentation of the platforms under test in opam
-  CI][platforms], allowing package others a clear overview of the extensive
-  build matrix we are providing.
+  CI](https://github.com/ocurrent/opam-repo-ci/blob/master/doc/platforms.md),
+  allowing package authors a clear overview of the extensive build matrix we
+  are providing.
 
 We hope these changes will make package publication experience smoother. We're
 committed to improving the experience for newcomers and existing repository