Remove 13.5.4 from the update path

This is not a required step, you can go
from 13.1.11 to 13.X.Z straight away.

https://gitlab.com/gitlab-org/gitlab/-/merge_requests/56279#note_547205102

doc/update/index.md

@@ -177,7 +177,7 @@ Find where your version sits in the upgrade path below, and upgrade GitLab
 accordingly, while also consulting the
 [version-specific upgrade instructions](#version-specific-upgrading-instructions):
 
-`8.11.Z` -> `8.12.0` -> `8.17.7` -> `9.5.10` -> `10.8.7` -> `11.11.8` -> `12.0.12` -> `12.1.17` -> `12.10.14` -> `13.0.14` -> `13.1.11`  -> `13.5.4` - > [latest `13.Y.Z`](https://about.gitlab.com/releases/categories/releases/)
+`8.11.Z` -> `8.12.0` -> `8.17.7` -> `9.5.10` -> `10.8.7` -> `11.11.8` -> `12.0.12` -> `12.1.17` -> `12.10.14` -> `13.0.14` -> `13.1.11`  -> [latest `13.Y.Z`](https://about.gitlab.com/releases/categories/releases/)
 
 The following table, while not exhaustive, shows some examples of the supported
 upgrade paths.