update error message

A circular dependency means that we are applying in a circle, so while
this changed it's just the _other_ side of the circle (are there even
sides on a circle? Help?)

In these cases, the errors are technically better, because this is the
first node we see where the circle starts.

Author: RobinMalfait

packages/tailwindcss/src/utilities.test.ts

@@ -17375,7 +17375,7 @@ describe('custom utilities', () => {
         ['foo', 'bar'],
       ),
     ).rejects.toThrowErrorMatchingInlineSnapshot(
-      `[Error: You cannot \`@apply\` the \`dark:foo\` utility here because it creates a circular dependency.]`,
+      `[Error: You cannot \`@apply\` the \`hover:bar\` utility here because it creates a circular dependency.]`,
     )
   })
 
@@ -17406,7 +17406,7 @@ describe('custom utilities', () => {
         ['foo', 'bar'],
       ),
     ).rejects.toThrowErrorMatchingInlineSnapshot(
-      `[Error: You cannot \`@apply\` the \`dark:foo\` utility here because it creates a circular dependency.]`,
+      `[Error: You cannot \`@apply\` the \`hover:bar\` utility here because it creates a circular dependency.]`,
     )
   })
 })