🗑️ Remove old link (KATO-Hiro#3583)

docker_containers/ruby/README.md

@@ -17,7 +17,7 @@
 | *Container OS* | Debian |
 | *Languages, platforms* | Ruby |
 
-See **[history](history)** for information on the contents of published images.
+See **history** for information on the contents of published images.
 
 ## Using this definition
 
@@ -46,7 +46,7 @@ You can decide how often you want updates by referencing a [semantic version](ht
 
 However, we only do security patching on the latest [non-breaking, in support](https://github.com/microsoft/vscode-dev-containers/issues/532) versions of images (e.g. `0-2.7`). You may want to run `apt-get update && apt-get upgrade` in your Dockerfile if you lock to a more specific version to at least pick up OS security updates.
 
-See [history](history) for information on the contents of each version and [here for a complete list of available tags](https://mcr.microsoft.com/v2/vscode/devcontainers/ruby/tags/list).
+See history for information on the contents of each version and [here for a complete list of available tags](https://mcr.microsoft.com/v2/vscode/devcontainers/ruby/tags/list).
 
 Alternatively, you can use the contents of `base.Dockerfile` to fully customize your container's contents or to build it for a container host architecture not supported by the image.