Use project_categories

[Roxedus]

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• I have read the contributing guideline and understand that I have made the correct modifications

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Description:

Depends on https://github.com/linuxserver/docker-documentation/pull/287
Allows https://github.com/linuxserver/docker-documentation/pull/292

Benefits of this PR and context:

How Has This Been Tested?

Source / References:

[LinuxServer-CI]

I am a bot, here are the test results for this PR:
https://ci-tests.linuxserver.io/lspipepr/jenkins-builder/43298c23-pkg-43298c23-dev-9ac934573895347aa42701ffff16bc437dddf1d3-pr-326/index.html
https://ci-tests.linuxserver.io/lspipepr/jenkins-builder/43298c23-pkg-43298c23-dev-9ac934573895347aa42701ffff16bc437dddf1d3-pr-326/shellcheck-result.xml

Tag	Passed
amd64-43298c23-pkg-43298c23-dev-9ac934573895347aa42701ffff16bc437dddf1d3-pr-326	✅
arm64v8-43298c23-pkg-43298c23-dev-9ac934573895347aa42701ffff16bc437dddf1d3-pr-326	✅

[LinuxServer-CI]

I am a bot, here are the test results for this PR:
https://ci-tests.linuxserver.io/lspipepr/jenkins-builder/43298c23-pkg-43298c23-dev-70e1008203e9e7370fb805523ed96dd1511bc549-pr-326/index.html
https://ci-tests.linuxserver.io/lspipepr/jenkins-builder/43298c23-pkg-43298c23-dev-70e1008203e9e7370fb805523ed96dd1511bc549-pr-326/shellcheck-result.xml

Tag	Passed
amd64-43298c23-pkg-43298c23-dev-70e1008203e9e7370fb805523ed96dd1511bc549-pr-326	✅
arm64v8-43298c23-pkg-43298c23-dev-70e1008203e9e7370fb805523ed96dd1511bc549-pr-326	✅

[LinuxServer-CI]

I am a bot, here are the test results for this PR:
https://ci-tests.linuxserver.io/lspipepr/jenkins-builder/43298c23-pkg-43298c23-dev-ea2905606fd7b6b2320294e7e082a95877a7d601-pr-326/index.html
https://ci-tests.linuxserver.io/lspipepr/jenkins-builder/43298c23-pkg-43298c23-dev-ea2905606fd7b6b2320294e7e082a95877a7d601-pr-326/shellcheck-result.xml

Tag	Passed
amd64-43298c23-pkg-43298c23-dev-ea2905606fd7b6b2320294e7e082a95877a7d601-pr-326	✅
arm64v8-43298c23-pkg-43298c23-dev-ea2905606fd7b6b2320294e7e082a95877a7d601-pr-326	✅