Fix regexp version check in tests (#221)

Signed-off-by: Jose Luis Rivero <jrivero@honurobotics.com>

Author: j-rivero

.github/workflows/test.yml

@@ -265,7 +265,7 @@ jobs:
         run: |
           source /opt/ros/humble/setup.bash
           ros2 pkg list | grep ros_gz
-          gz sim --version | grep 'version 8.[0-9*].[0-9*]'
+          gz sim --version | grep -E 'version 8\.[0-9]+\.[0-9]+'
 
   test_install_ros_gz_official:
     name: 'Install Humble and Fortress side-by-side'
@@ -324,7 +324,7 @@ jobs:
           source /opt/ros/jazzy/setup.bash
           ! [ $(apt list --installed gz-harmonic) ]
           ros2 pkg list | grep ros_gz
-          gz sim --version | grep 'version 8.[0-9*].[0-9*]'
+          gz sim --version | grep -E 'version 8\.[0-9]+\.[0-9]+'
 
   test_install_ros_gz_kilted:
     name: 'Install Ionic on Kilted through vendor packages'
@@ -354,4 +354,4 @@ jobs:
           source /opt/ros/kilted/setup.bash
           ! [ $(apt list --installed gz-ionic) ]
           ros2 pkg list | grep ros_gz
-          gz sim --version | grep 'version 9.[0-9*].[0-9*]'
+          gz sim --version | grep -E 'version 9\.[0-9]+\.[0-9]+'

README.md

@@ -302,7 +302,7 @@ This example shows the installation of ROS 2 Jazzy and Gazebo Harmonic which is
             source /opt/ros/jazzy/setup.bash
             ! [ $(apt list --installed gz-harmonic) ]
             ros2 pkg list | grep ros_gz
-            gz sim --version | grep 'version 8.[0-9*].[0-9*]'
+            gz sim --version | grep -E 'version 8\.[0-9]+\.[0-9]+'
 ```
 
 - *Installing ROS 2 Kilted with Gazebo Ionic*
@@ -336,7 +336,7 @@ This example shows the installation of ROS 2 Kilted and Gazebo Ionic. Kilted use
             source /opt/ros/kilted/setup.bash
             ! [ $(apt list --installed gz-ionic) ]
             ros2 pkg list | grep ros_gz
-            gz sim --version | grep 'version 9.[0-9*].[0-9*]'
+            gz sim --version | grep -E 'version 9\.[0-9]+\.[0-9]+'
 ```
 
 ### macOS