constants: Add more details to GPGPublicKey comment

This also removes the explicit keyserver as they are synced with each
other, and this allows distros to change the default if they want.

Author: cfergeau

pkg/crc/constants/constants.go

@@ -42,8 +42,9 @@ const (
 	ClusterDomain = ".crc.testing"
 	AppsDomain    = ".apps-crc.testing"
 
-	// GPGPublicKey key is submitted to keyserver.ubuntu.com and can be fetched using
-	// gpg --keyserver hkps://keyserver.ubuntu.com --recv-key DC7EAC400A1BFDFB
+	// This public key is owned by the CRC team (crc@crc.dev), and is used
+	// to sign bundles uploaded to an image registry.
+	// It can be fetched with: `gpg --recv-key DC7EAC400A1BFDFB`
 	GPGPublicKey = `-----BEGIN PGP PUBLIC KEY BLOCK-----
 
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