docs: added list of valid namespace codes for the cacheTtlOverride config

docs/usage/self-hosted-configuration.md

@@ -344,6 +344,93 @@ For example, to override the default TTL of 60 minutes for the `docker` datasour
 }
 ```
 
+Valid codes for namespaces are as follows:
+
+- `\_test-namespace`
+- `changelog-bitbucket-notes@v2`
+- `changelog-bitbucket-release`
+- `changelog-gitea-notes@v2`
+- `changelog-gitea-release`
+- `changelog-github-notes@v2`
+- `changelog-github-release`
+- `changelog-gitlab-notes@v2`
+- `changelog-gitlab-release`
+- `datasource-artifactory`
+- `datasource-aws-machine-image`
+- `datasource-aws-rds`
+- `datasource-azure-bicep-resource`
+- `datasource-azure-pipelines-tasks`
+- `datasource-bazel`
+- `datasource-bitbucket-tags`
+- `datasource-bitrise`
+- `datasource-cdnjs`
+- `datasource-conan`
+- `datasource-conda`
+- `datasource-cpan`
+- `datasource-crate-metadata`
+- `datasource-crate`
+- `datasource-deb`
+- `datasource-deno`
+- `datasource-docker-architecture`
+- `datasource-docker-hub-cache`
+- `datasource-docker-digest`
+- `datasource-docker-hub-tags`
+- `datasource-docker-imageconfig`
+- `datasource-docker-labels`
+- `datasource-docker-releases-v2`
+- `datasource-docker-tags`
+- `datasource-dotnet-version`
+- `datasource-endoflife-date`
+- `datasource-galaxy-collection`
+- `datasource-galaxy`
+- `datasource-git-refs`
+- `datasource-git-tags`
+- `datasource-git`
+- `datasource-gitea-releases`
+- `datasource-gitea-tags`
+- `datasource-github-release-attachments`
+- `datasource-gitlab-packages`
+- `datasource-gitlab-releases`
+- `datasource-gitlab-tags`
+- `datasource-glasskube-packages`
+- `datasource-go-direct`
+- `datasource-go-proxy`
+- `datasource-go`
+- `datasource-golang-version`
+- `datasource-gradle-version`
+- `datasource-helm`
+- `datasource-hermit`
+- `datasource-hex`
+- `datasource-hexpm-bob`
+- `datasource-java-version`
+- `datasource-jenkins-plugins`
+- `datasource-maven`
+- `datasource-maven:head-requests-timeout`
+- `datasource-maven:head-requests`
+- `datasource-maven:metadata-xml`
+- `datasource-node-version`
+- `datasource-npm:data`
+- `datasource-nuget-v3`
+- `datasource-orb`
+- `datasource-packagist`
+- `datasource-pod`
+- `datasource-python-version`
+- `datasource-releases`
+- `datasource-repology`
+- `datasource-ruby-version`
+- `datasource-rubygems`
+- `datasource-sbt-package`
+- `datasource-terraform-module`
+- `datasource-terraform-provider`
+- `datasource-terraform`
+- `datasource-unity3d`
+- `github-releases-datasource-v2`
+- `github-tags-datasource-v2`
+- `merge-confidence`
+- `preset`
+- `terraform-provider-hash`
+- `url-sha256`
+
 ## checkedBranches
 
 This array will allow you to set the names of the branches you want to rebase/create, as if you selected their checkboxes in the Dependency Dashboard issue.
@@ -370,14 +457,14 @@ This configuration will be applied after all other environment variables so you
 
 If configuring secrets in to `customEnvVariables`, take this approach:
 
-```js
+```
 {
   secrets: {
-    SECRET_TOKEN: process.env.SECRET_TOKEN,
+    SECRET_TOKEN: process.env.SECRET_TOKEN
   },
   customEnvVariables: {
-    SECRET_TOKEN: '{{ secrets.SECRET_TOKEN }}',
-  },
+    SECRET_TOKEN: '{{ secrets.SECRET_TOKEN }}'
+  }
 }
 ```