Fixed broken external links

Related to: https://gitlab.com/gitlab-org/technical-writing/-/issues/492

doc/integration/saml.md

@@ -718,8 +718,8 @@ documentation on how to use SAML to sign in to GitLab.
 Examples:
 
 - [ADFS (Active Directory Federation Services)](https://docs.microsoft.com/en-us/windows-server/identity/ad-fs/operations/create-a-relying-party-trust)
-- [Auth0](https://auth0.com/docs/protocols/saml-protocol/configure-auth0-as-saml-identity-provider)
-- [PingOne by Ping Identity](https://docs.pingidentity.com/bundle/pingone/page/xsh1564020480660-1.html)
+- [Auth0](https://auth0.com/docs/configure/saml-configuration/configure-auth0-saml-identity-provider)
+- [PingOne by Ping Identity](http://docs.pingidentity.com/bundle/pingoneforenterprise/page/xsh1564020480660-1.html)
 
 GitLab provides the following setup notes for guidance only.
 If you have any questions on configuring the SAML app, please contact your provider's support.

doc/user/project/repository/mirror/index.md

@@ -106,7 +106,7 @@ fingerprints in the open for you to check:
 
 - [AWS CodeCommit](https://docs.aws.amazon.com/codecommit/latest/userguide/regions.html#regions-fingerprints)
 - [Bitbucket](https://support.atlassian.com/bitbucket-cloud/docs/configure-ssh-and-two-step-verification/)
-- [GitHub](https://docs.github.com/en/github/authenticating-to-github/keeping-your-account-and-data-secure/githubs-ssh-key-fingerprints)
+- [GitHub](https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/githubs-ssh-key-fingerprints)
 - [GitLab.com](../../../gitlab_com/index.md#ssh-host-keys-fingerprints)
 - [Launchpad](https://help.launchpad.net/SSHFingerprints)
 - [Savannah](http://savannah.gnu.org/maintenance/SshAccess/)

doc/user/project/repository/mirror/pull.md

@@ -51,8 +51,8 @@ After you configure a GitLab repository as a pull mirror:
 Prerequisite:
 
 - If your remote repository is on GitHub and you have
-  [two-factor authentication (2FA) configured](https://docs.github.com/en/github/authenticating-to-github/securing-your-account-with-two-factor-authentication-2fa),
-  create a [personal access token for GitHub](https://docs.github.com/en/github/authenticating-to-github/keeping-your-account-and-data-secure/creating-a-personal-access-token)
+  [two-factor authentication (2FA) configured](https://docs.github.com/en/authentication/securing-your-account-with-two-factor-authentication-2fa),
+  create a [personal access token for GitHub](https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/creating-a-personal-access-token)
   with the `repo` scope. If 2FA is enabled, this personal access
   token serves as your GitHub password.
 

doc/user/project/repository/mirror/push.md

@@ -66,7 +66,7 @@ After the mirror is created, this option can only be modified via the [API](../.
 
 To set up a mirror from GitLab to GitHub, you must follow these steps:
 
-1. Create a [GitHub personal access token](https://docs.github.com/en/github/authenticating-to-github/keeping-your-account-and-data-secure/creating-a-personal-access-token) with the `public_repo` box checked.
+1. Create a [GitHub personal access token](https://docs.github.com/en/authentication/keeping-your-account-and-data-secure/creating-a-personal-access-token) with the `public_repo` box checked.
 1. Fill in the **Git repository URL** field using this format: `https://<your_github_username>@github.com/<your_github_group>/<your_github_project>.git`.
 1. Fill in **Password** field with your GitHub personal access token.
 1. Select **Mirror repository**.