README: update directory structure

Author: whentojump

README.md

@@ -22,7 +22,7 @@ linux-mcdc
 │
 ├── patches
 │   ├── README.md
-│   └── v0.4
+│   └── {v0.4,v0.5}
 │       ├── 0000-cover-letter.patch
 │       ├── 0001-clang_instr_profile-add-Clang-s-Source-based-Code-Co.patch
 │       ├── 0002-kbuild-clang_instr_profile-disable-instrumentation-i.patch