Fix navigation style in docs

Signed-off-by: Takuya Noguchi <takninnovationresearch@gmail.com>

changelogs/unreleased/55836-docs-fix-navigation-style-in-docs.yml

+---
+title: Fix navigation style in docs
+merge_request: 24090
+author: Takuya Noguchi
+type: other

doc/administration/monitoring/performance/request_profiling.md

@@ -2,14 +2,14 @@
 
 ## Procedure
 
-1. Grab the profiling token from `Monitoring > Requests Profiles` admin page
+1. Grab the profiling token from **Monitoring > Requests Profiles** admin page
   (highlighted in a blue in the image below).
   ![Profile token](img/request_profiling_token.png)
 1. Pass the header `X-Profile-Token: <token>` to the request you want to profile. You can use:
     - Browser extensions. For example, [ModHeader](https://chrome.google.com/webstore/detail/modheader/idgpnmonknjnojddfkpgkljpfnnfcklj) Chrome extension.
     - `curl`. For example, `curl --header 'X-Profile-Token: <token>' https://gitlab.example.com/group/project`.
 1. Once request is finished (which will take a little longer than usual), you can
-  view the profiling output from `Monitoring > Requests Profiles` admin page.
+  view the profiling output from **Monitoring > Requests Profiles** admin page.
   ![Profiling output](img/request_profile_result.png)
 
 ## Cleaning up

doc/ci/examples/test-and-deploy-python-application-to-heroku.md

@@ -47,7 +47,7 @@ This project has three jobs:
 
 ## Store API keys
 
-You'll need to create two variables in `Settings > CI/CD > Variables` on your GitLab project settings:
+You'll need to create two variables in **Settings > CI/CD > Variables** in your GitLab project:
 
 - `HEROKU_STAGING_API_KEY` - Heroku API key used to deploy staging app.
 - `HEROKU_PRODUCTION_API_KEY` - Heroku API key used to deploy production app.

doc/user/project/integrations/prometheus.md

@@ -30,7 +30,7 @@ GitLab can seamlessly deploy and manage Prometheus on a [connected Kubernetes cl
 
 Once you have a connected Kubernetes cluster with Helm installed, deploying a managed Prometheus is as easy as a single click.
 
-1. Go to the `Operations > Kubernetes` page, to view your connected clusters
+1. Go to the **Operations > Kubernetes** page to view your connected clusters
 1. Select the cluster you would like to deploy Prometheus to
 1. Click the **Install** button to deploy Prometheus to the cluster