Update RELEASE.md with improved container instructions

Added platform-specific Docker commands for macOS/Linux and Windows to the verification section. Updated reference to the appendix with a markdown link for better navigation.

Author: jamesfredley

RELEASE.md

@@ -83,7 +83,7 @@ For Example:
 Please note that this script will perform steps that will require rebuilding the project & comparing the built artifacts
 to the staged artifacts. Due to OS differences, this can result in reproducibility issues. For this reason, it's advised
 to run these scripts from an environment similar to the GitHub actions environment. See the section
-`Appendix: Verification from a Container` for how to launch a container that closely resembles the GitHub actions
+[Appendix: Verification from a Container](RELEASE.md#appendix-verification-from-a-container) for how to launch a container that closely resembles the GitHub actions
 environment.
 
 If manual verification is desired, the steps below can be followed.
@@ -385,12 +385,20 @@ Setup the key for validity:
 The Grails image is officially built on linux in a GitHub action using an Ubuntu container. To run a linux container
 locally, you can use the following command (substitute `<git-tag-of-release` with the tag name):
 
+**macOS/Linux**
 ```bash
     docker build -t grails:testing -f etc/bin/Dockerfile . && docker run -it --rm -v $(pwd):/home/groovy/project -p 8080:8080 grails:testing bash
     cd grails-verify
     verify.sh <git-tag-of-release> .
 ```
 
+**Windows**
+```bash
+    docker build -t grails:testing -f etc/bin/Dockerfile . && docker run -it --rm -v "%CD%:/home/groovy/project" -p 8080:8080 grails:testing bash
+    cd grails-verify
+    verify.sh <git-tag-of-release> .
+```
+
 Please note that the argument `-p 8080:8080` is used to expose the port 8080 of the container to the host machine's port 8080 (fromContainerPort:toHostPort). This allows you to access any running Grails application in the container from your host. If you have another application on port 8080, you can change the port mapping to avoid conflicts, e.g., `-p 8080:8081`. 
 
 In the event that artifacts differ, simply copy them to your project directory and work on your local machine instead of the docker image: