Apply the same fix to runtime-class.md

Author: oradwell

content/en/docs/concepts/containers/runtime-class.md

@@ -116,7 +116,7 @@ Runtime handlers are configured through containerd's configuration at
 [plugins."io.containerd.grpc.v1.cri".containerd.runtimes.${HANDLER_NAME}]
 ```
 
-See containerd's [config documentation](https://github.com/containerd/cri/blob/master/docs/config.md)
+See containerd's [config documentation](https://github.com/containerd/containerd/blob/main/docs/cri/config.md)
 for more details:
 
 #### {{< glossary_tooltip term_id="cri-o" >}}