fix: detection of `CustomMetadata` type #850

Job	Run time
megalinter	1m 38s
commit-lint	1m 18s
npm-lint	1m 6s
pull-request-lint	4s
build / source	2m 14s
publish-dev	1m 21s
e2e-check / e2e-test (macos-latest, 18, sfdx-cli)	1m 55s
e2e-check / e2e-test (macos-latest, 18, @salesforce/cli)	2m 4s
e2e-check / e2e-test (macos-latest, 20, sfdx-cli)	2m 12s
e2e-check / e2e-test (macos-latest, 20, @salesforce/cli)	2m 13s
e2e-check / e2e-test (windows-latest, 18, sfdx-cli)	4m 27s
e2e-check / e2e-test (windows-latest, 18, @salesforce/cli)	4m 36s
e2e-check / e2e-test (windows-latest, 20, sfdx-cli)	3m 34s
e2e-check / e2e-test (windows-latest, 20, @salesforce/cli)	3m 52s
e2e-check / e2e-test (ubuntu-latest, 18, sfdx-cli)	51s
e2e-check / e2e-test (ubuntu-latest, 18, @salesforce/cli)	54s
e2e-check / e2e-test (ubuntu-latest, 20, sfdx-cli)	49s
e2e-check / e2e-test (ubuntu-latest, 20, @salesforce/cli)	49s
	35m 57s

Provide feedback