man page: fix argument order for `brew create`

The implementation requires that the URL is the first argument.

Closes Homebrew/homebrew#21597.

Signed-off-by: Adam Vandenberg <flangy@gmail.com>

Library/Contributions/manpages/brew.1.md

@@ -63,7 +63,7 @@ Note that these flags should only appear after a command.
     versions of formula. Note downloads for any installed formula will still not be
     deleted. If you want to delete those too: `rm -rf $(brew --cache)`
 
-  * `create [--autotools|--cmake] [--no-fetch] [--set-name <name>] [--set-version <version>]` <URL>:
+  * `create <URL> [--autotools|--cmake] [--no-fetch] [--set-name <name>] [--set-version <version>]`:
     Generate a formula for the downloadable file at <URL> and open it in the editor.
     Homebrew will attempt to automatically derive the formula name
     and version, but if it fails, you'll have to make your own template. The wget