Fixed broken links

Related to: https://gitlab.com/gitlab-org/technical-writing/-/issues/353

doc/user/compliance/license_compliance/index.md

@@ -76,7 +76,7 @@ The reported licenses might be incomplete or inaccurate.
 | Elixir     | [Mix](https://elixir-lang.org/getting-started/mix-otp/introduction-to-mix.html)                               |
 | C++/C      | [Conan](https://conan.io/)                                                                                    |
 | Scala      | [sbt](https://www.scala-sbt.org/)                                                                             |
-| Rust       | [Cargo](https://crates.io)                                                                                    |
+| Rust       | [Cargo](https://crates.io/)                                                                                   |
 | PHP        | [Composer](https://getcomposer.org/)                                                                          |
 
 ## Requirements

doc/user/project/integrations/gitlab_slack_application.md

@@ -37,7 +37,7 @@ integration settings.
 
 Keep in mind that you need to have the appropriate permissions for your Slack
 team in order to be able to install a new application, read more in Slack's
-docs on [Adding an app to your workspace](https://slack.com/help/articles/202035138-Add-an-app-to-your-workspace).
+docs on [Adding an app to your workspace](https://slack.com/help/articles/202035138-Add-apps-to-your-Slack-workspace).
 
 To enable the GitLab service for your Slack team: