chore: update Nx to v21 (#1082) #490

Job	Run time
Update code coverage (cli, int)	45s
Update code coverage (cli, unit)	50s
Update code coverage (core, unit)	46s
Update code coverage (plugin-eslint, unit)	46s
Update code coverage (plugin-coverage, int)	46s
Update code coverage (plugin-lighthouse, unit)	52s
Update code coverage (models, unit)	49s
Update code coverage (plugin-coverage, unit)	52s
Update code coverage (utils, unit)	52s
Update code coverage (utils, int)	55s
Update code coverage (plugin-eslint, int)	53s
Update code coverage (plugin-js-packages, unit)	50s
Update code coverage (plugin-js-packages, int)	49s
Update code coverage (models, int)	40s
Update code coverage (plugin-lighthouse, int)	41s
Update code coverage (core, int)	47s
	12m 53s

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