Added list of valid namespace codes for the cacheTtlOverride configur…

…ation

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.