message: docs: correct ubuntu libtool package
diff: @@ -25,10 +25,10 @@ testing purposes. The specific versions of the Envoy dependencies used in this b
  up-to-date with the latest security patches.
  1. [Install Bazel](https://bazel.build/versions/master/docs/install.html) in your environment.
  -2. Install external dependencies libtoolize, cmake, and realpath libraries separately.
  +2. Install external dependencies libtool, cmake, and realpath libraries separately.
  On Ubuntu, run the following commands:
  ```
  - apt-get install libtoolize
  + apt-get install libtool
  apt-get install cmake
  apt-get install realpath
  ```
  