Fix all the old usage of admonition syntax (#107098)

docs/sources/shared/upgrade/intro.md

@@ -12,14 +12,14 @@ Because Grafana upgrades are backward compatible, the upgrade process is straigh
 
 In addition to common tasks you should complete for all versions of Grafana, there might be additional upgrade tasks to complete for a version.
 
-{{% admonition type="note" %}}
+{{< admonition type="note" >}}
 There might be breaking changes in some releases. We outline these changes in the [What's New ](https://grafana.com/docs/grafana/<GRAFANA_VERSION>/whatsnew/) document for most releases or a separate [Breaking changes](https://grafana.com/docs/grafana/<GRAFANA_VERSION>/breaking-changes/) document for releases with many breaking changes.
-{{% /admonition %}}
+{{< /admonition >}}
 
 For versions of Grafana prior to v9.2, we published additional information in the [Release Notes](https://grafana.com/docs/grafana/<GRAFANA_VERSION>/release-notes/).
 
 When available, we list all changes with links to pull requests or issues in the [Changelog](https://github.com/grafana/grafana/blob/main/CHANGELOG.md).
 
-{{% admonition type="note" %}}
+{{< admonition type="note" >}}
 When possible, we recommend that you test the Grafana upgrade process in a test or development environment.
-{{% /admonition %}}
+{{< /admonition >}}

docs/sources/shared/upgrade/upgrade-common-tasks.md

@@ -90,9 +90,9 @@ To upgrade Grafana running in a Docker container, complete the following steps:
 
 1. Run a commands similar to the following commands.
 
-   {{% admonition type="note" %}}
+   {{< admonition type="note" >}}
    This is an example. The parameters you enter depend on how you configured your Grafana container.
-   {{% /admonition %}}
+   {{< /admonition >}}
 
    ```bash
    docker pull grafana/grafana