Updated README.md to include GNUPG2 installation for setup on Windows…

… WSL (#11465)

* add: gnupg2 installation for Project setup in Windows subsystem for linux - README.md

* add: gnupg2 installation for Project setup in Windows subsystem for linux - README.md

Co-authored-by: RealRichi3 <molunorichie@gmail.comn>

README.md

@@ -135,6 +135,7 @@ Before continuing with the installation steps in this README, users of Windows S
   * `sudo apt install libyaml-dev make pkg-config sqlite3 zlib1g-dev libgmp-dev`
   * `sudo apt install libreadline-dev libssl-dev`
 2. Add GPG Key & Install RVM:
+  * `sudo apt install gnupg2`
   * `gpg2 --recv-keys 409B6B1796C275462A1703113804BB82D39DC0E3 7D2BAF1CF37B13E2069D6956105BD0E739499BDB`
   * `curl -sSL https://get.rvm.io | bash -s stable`
 3. Load the Script environment variables using source command: