convert build cloud CI platform tabs to linkable sections (#22111)

<!--Delete sections as needed -->

## Description

This change converts the CI platform examples from Hugo tab shortcodes
to standard markdown sections with anchor links so that we can hyperlink
to them from app.docker.com


## Related issues or tickets

none

## Reviews

<!-- Notes for reviewers here -->
<!-- List applicable reviews (optionally @tag reviewers) -->

- [ ] Technical review
- [ ] Editorial review
- [ ] Product review

---------

Co-authored-by: Allie Sadler <[email protected]>

Author: nico1510

content/manuals/build-cloud/ci.md

@@ -32,8 +32,9 @@ See [Loading build results](./usage/#loading-build-results) for details.
 > Builds on Docker Build Cloud have a timeout limit of two hours. Builds that
 > run for longer than two hours are automatically cancelled.
 
-{{< tabs >}}
-{{< tab name="GitHub Actions" >}}
+## CI platform examples
+
+### GitHub Actions
 
 > [!NOTE]
 >
@@ -87,8 +88,7 @@ jobs:
           outputs: ${{ github.event_name == 'pull_request' && 'type=cacheonly' || 'type=registry' }}
 ```
 
-{{< /tab >}}
-{{< tab name="GitLab" >}}
+### GitLab
 
 ```yaml
 default:
@@ -133,8 +133,7 @@ build_cache:
         .
 ```
 
-{{< /tab >}}
-{{< tab name="Circle CI" >}}
+### Circle CI
 
 ```yaml
 version: 2.1
@@ -195,8 +194,7 @@ workflows:
       - build_push
 ```
 
-{{< /tab >}}
-{{< tab name="Buildkite" >}}
+### Buildkite
 
 The following example sets up a Buildkite pipeline using Docker Build Cloud. The
 example assumes that the pipeline name is `build-push-docker` and that you
@@ -273,8 +271,7 @@ docker buildx build \
     .
 ```
 
-{{< /tab >}}
-{{< tab name="Jenkins" >}}
+### Jenkins
 
 ```groovy
 pipeline {
@@ -309,8 +306,7 @@ pipeline {
 }
 ```
 
-{{< /tab >}}
-{{< tab name="Travis CI" >}}
+### Travis CI
 
 ```yaml
 language: minimal 
@@ -341,8 +337,7 @@ script: |
   --tag "$IMAGE_NAME" .
 ```
 
-{{< /tab >}}
-{{< tab name="BitBucket Pipelines" >}}
+### BitBucket Pipelines 
 
 ```yaml
 # Prerequisites: $DOCKER_USER, $DOCKER_PAT setup as deployment variables
@@ -372,8 +367,7 @@ pipelines:
           - docker
 ```
 
-{{< /tab >}}
-{{< tab name="Shell" >}}
+### Shell script
 
 ```bash
 #!/bin/bash
@@ -407,8 +401,7 @@ docker buildx build \
     .
 ```
 
-{{< /tab >}}
-{{< tab name="Docker Compose" >}}
+### Docker Compose
 
 Use this implementation if you want to use `docker compose build` with
 Docker Build Cloud in CI.
@@ -442,6 +435,3 @@ docker buildx create --use --driver cloud "<ORG>/default"
 # Build the image build
 docker compose build
 ```
-
-{{< /tab >}}
-{{< /tabs >}}