[cpp] Improve the clangd installation snippet in README.md

Signed-off-by: Jan Keromnes <[email protected]>

packages/cpp/README.md

@@ -7,8 +7,7 @@ To install Clangd on Ubuntu 18.04:
 
     $ wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
     $ echo "deb http://apt.llvm.org/bionic/ llvm-toolchain-bionic main" | sudo tee /etc/apt/sources.list.d/llvm.list
-    $ sudo apt-get update && sudo apt-get install -y clang-tools-8
-    $ sudo ln -s /usr/bin/clangd-8 /usr/bin/clangd
+    $ sudo apt-get update && sudo apt-get install -y clangd
 
 See [here](https://clang.llvm.org/extra/clangd.html#id4) for detailed
 installation instructions.