Update src/bootstrap/mk/Makefile.in

Co-authored-by: Ralf Jung <post@ralfj.de>

Author: zachs18

src/bootstrap/mk/Makefile.in

@@ -58,7 +58,7 @@ check-aux:
 		library/core \
 		library/alloc \
 		--no-doc
-	# Some use file system operations to demonstrate dealing with `Result`.
+	# Some doctests use file system operations to demonstrate dealing with `Result`.
 	$(Q)MIRIFLAGS="-Zmiri-disable-isolation" \
 		$(BOOTSTRAP) miri --stage 2 \
 		library/core \