fix(release): do not try to interpolate packageRoot for root project

[fahslaj]

Current Behavior

Nx Release errors when the root project is in the project graph and projectsRelationship is 'independent'.

Expected Behavior

Nx Release does not error when the root project is in the project graph and projectsRelationship is 'independent'.

Related Issue(s)

Fixes #
#22678

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✅ Successfully ran 6 targets

• nx affected --targets=e2e,e2e-ci --base=2cb43cac8d67a77019d73c178ed0627a66f20fb0 --head=d11159ac8380ded7f358055b3b224f41e32a032a --parallel=1
• nx affected --targets=lint,test,build --base=2cb43cac8d67a77019d73c178ed0627a66f20fb0 --head=d11159ac8380ded7f358055b3b224f41e32a032a --parallel=3
• nx run-many -t check-imports check-commit check-lock-files check-codeowners documentation --parallel=1 --no-dte
• nx-cloud record -- nx format:check --base=2cb43cac8d67a77019d73c178ed0627a66f20fb0 --head=d11159ac8380ded7f358055b3b224f41e32a032a
• nx documentation --no-dte
• nx affected -t e2e-macos --parallel=1 --base=2cb43cac8d67a77019d73c178ed0627a66f20fb0 --head=d11159ac8380ded7f358055b3b224f41e32a032a

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Name	Status	Preview	Updated (UTC)
nx-dev	✅ Ready (Inspect)	Visit Preview	Apr 11, 2024 7:53pm

[fahslaj]

cc @JamesHenry

[github-actions]

This pull request has already been merged/closed. If you experience issues related to these changes, please open a new issue referencing this pull request.