more robust escape for awk double quote (#6288) (#6289)

(cherry picked from commit 4012c6f)

Co-authored-by: Adam Setapen <asetapen@gmail.com>

Author: mergify[bot]

source/Installation/RHEL-Install-RPMs.rst

@@ -45,7 +45,7 @@ Next, download the ``ros2-release`` package and install it:
 .. code-block:: console
 
    $ sudo dnf install curl
-   $ export ROS_APT_SOURCE_VERSION=$(curl -s https://api.github.com/repos/ros-infrastructure/ros-apt-source/releases/latest | grep -F "tag_name" | awk -F\" '{print $4}')
+   $ export ROS_APT_SOURCE_VERSION=$(curl -s https://api.github.com/repos/ros-infrastructure/ros-apt-source/releases/latest | grep -F "tag_name" | awk -F'"' '{print $4}')
    $ sudo dnf install "https://github.com/ros-infrastructure/ros-apt-source/releases/download/${ROS_APT_SOURCE_VERSION}/ros2-release-${ROS_APT_SOURCE_VERSION}-1.noarch.rpm"
 
 The `ros2-release <https://github.com/ros-infrastructure/ros-apt-source/>`_ package provides keys and repo configuration for the various ROS repositories.

source/Installation/_Apt-Repositories.rst

@@ -15,6 +15,6 @@ Updates to repository configuration will occur automatically when new versions o
 .. code-block:: console
 
    $ sudo apt update && sudo apt install curl -y
-   $ export ROS_APT_SOURCE_VERSION=$(curl -s https://api.github.com/repos/ros-infrastructure/ros-apt-source/releases/latest | grep -F "tag_name" | awk -F\" '{print $4}')
+   $ export ROS_APT_SOURCE_VERSION=$(curl -s https://api.github.com/repos/ros-infrastructure/ros-apt-source/releases/latest | grep -F "tag_name" | awk -F'"' '{print $4}')
    $ curl -L -o /tmp/ros2-apt-source.deb "https://github.com/ros-infrastructure/ros-apt-source/releases/download/${ROS_APT_SOURCE_VERSION}/ros2-apt-source_${ROS_APT_SOURCE_VERSION}.$(. /etc/os-release && echo ${UBUNTU_CODENAME:-${VERSION_CODENAME}})_all.deb"
    $ sudo dpkg -i /tmp/ros2-apt-source.deb