Update CODEOWNERS to reflect that logger has been moved out of std.experimental (#10608)

This should have been done with #8486 IMHO.

Author: 0xEAB

CODEOWNERS

@@ -36,13 +36,13 @@ std/digest/*
 # std/exception.d
 std/experimental/allocator/* @PetarKirov
 std/experimental/checkedint/*
-std/experimental/logger/* @burner
 std/file.d @CyberShadow
 # std/format.d
 # std/functional.d
 # std/getopt.d
 # std/internal/
 std/json.d @CyberShadow
+std/logger/* @burner
 std/math* @ibuclaw
 std/meta.d @PetarKirov
 # std/mmfile.d