Cannot run assembly:assembly for client or server

Trying to follow [The 'Build your own Release' guide](https://github.com/magefree/mage/wiki/Development-Workflow#build-your-own-release) and i found that the assembly:assembly mojo cannot be found:

```
"C:\Program Files\Java\jdk1.8.0_181\bin\java.exe" -Dmaven.multiModuleProjectDirectory=C:\Users\Jim\IdeaProjects\mage\Mage.Server -Djansi.passthrough=true "-Dmaven.home=C:\Users\Jim\AppData\Local\Programs\IntelliJ IDEA Ultimate\plugins\maven\lib\maven3" "-Dclassworlds.conf=C:\Users\Jim\AppData\Local\Programs\IntelliJ IDEA Ultimate\plugins\maven\lib\maven3\bin\m2.conf" "-Dmaven.ext.class.path=C:\Users\Jim\AppData\Local\Programs\IntelliJ IDEA Ultimate\plugins\maven\lib\maven-event-listener.jar" "-javaagent:C:\Users\Jim\AppData\Local\Programs\IntelliJ IDEA Ultimate\lib\idea_rt.jar=61387:C:\Users\Jim\AppData\Local\Programs\IntelliJ IDEA Ultimate\bin" -Dfile.encoding=UTF-8 -classpath "C:\Users\Jim\AppData\Local\Programs\IntelliJ IDEA Ultimate\plugins\maven\lib\maven3\boot\plexus-classworlds-2.7.0.jar;C:\Users\Jim\AppData\Local\Programs\IntelliJ IDEA Ultimate\plugins\maven\lib\maven3\boot\plexus-classworlds.license" org.codehaus.classworlds.Launcher -Didea.version=2023.3.2 assembly:assembly
[INFO] Scanning for projects...
[INFO] ------------------------------------------------------------------------
[INFO] BUILD FAILURE
[INFO] ------------------------------------------------------------------------
[INFO] Total time: 0.266 s
[INFO] Finished at: 2024-01-01T13:17:18-05:00
[INFO] ------------------------------------------------------------------------
[ERROR] Could not find goal 'assembly' in plugin org.apache.maven.plugins:maven-assembly-plugin:3.6.0 among available goals help, single -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/MojoNotFoundException

Process finished with exit code 1
```

Upon digging through the mojos of maven's assembly plugin, it looks like assembly:assembly was depreciated years ago in favor of assembly:single, which has slightly different behavior.
This is an archive of the latest released version of the assembly plugin that supports assembly:assembly: https://maven.apache.org/plugins-archives/maven-assembly-plugin-2.4.1/plugin-info.html

This plugin is included in [maven version 3.3.9](https://maven.apache.org/ref/3.3.9/plugin-management.html), which was released in 2015 for Java 7.

I must be missing something here because it seems like no one else has this issue, and the development setup guides don't mention downloading any specific archived version of Maven.