Auto merge of #2663 - woodruffw-forks:os-macos-style, r=JohnTitor

categories: "mac OS" -> "macOS"

This is a tiny nitpick that I noticed while opening #2662: Apple stylizes their operating system without the space, so I figured consistency with their style makes sense.

Author: bors

src/boot/categories.toml

@@ -350,9 +350,9 @@ Bindings to operating system-specific APIs.\
 """
 
 [os.categories.macos-apis]
-name = "mac OS APIs"
+name = "macOS APIs"
 description = """
-Bindings to mac OS-specific APIs.\
+Bindings to macOS-specific APIs.\
 """
 
 [os.categories.unix-apis]