Update README.md

Author: eiennohito

README.md

@@ -16,10 +16,7 @@ the original Juman++.
   * For example gcc 5.1+, clang 3.4+, MSVC 2017
   * We test on GCC and clang on Linux/MacOS, mingw64-gcc and MSVC2017 on Windows
 - CMake v3.1 or later
-- For Ubuntu22.04, you need to install additional packages as follows:
-
-```bash
-$ sudo apt install libprotobuf-dev protobuf-compiler
+- For Ubuntu22.04, you need to install additional packages as follows: `sudo apt install libprotobuf-dev protobuf-compiler`
 
 Read [this document](docs/building.md) for CentOS and RHEL derivatives or non-CMake alternatives.