Update README.md

Co-authored-by: Matthew John Cheetham <mjcheetham@github.com>

Author: wolf99

README.md

@@ -268,7 +268,7 @@ When using GitHub logos, please be sure to follow the [GitHub logo guidelines][g
 [bitbucket]: https://bitbucket.org
 [bitbucket-ssh]: https://confluence.atlassian.com/bitbucket/ssh-keys-935365775.html
 [build-status-badge]: https://github.com/GitCredentialManager/git-credential-manager/actions/workflows/continuous-integration.yml/badge.svg
-[.NET]: https://dotnet.microsoft.com
+[dotnet]: https://dotnet.microsoft.com
 [gcm]: https://github.com/GitCredentialManager/git-credential-manager
 [gcm-arch]: docs/architecture.md
 [gcm-azure-tokens]: docs/azrepos-users-and-tokens.md