Prepare for 8.0.0 Release (#2181)

Signed-off-by: Addisu Z. Taddese <[email protected]>

Author: azeey

CMakeLists.txt

@@ -18,7 +18,7 @@ find_package(gz-cmake3 REQUIRED)
 set(CMAKE_CXX_STANDARD 17)
 set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
-gz_configure_project(VERSION_SUFFIX pre2)
+gz_configure_project(VERSION_SUFFIX)
 
 #============================================================================
 # Set project-specific options

Changelog.md

@@ -1,6 +1,6 @@
 ## Gazebo Sim 8.x
 
-### Gazebo Sim 8.X.X (20XX-XX-XX)
+### Gazebo Sim 8.0.0 (2023-09-29)
 
 1. TouchPlugin: Reset the plugin with the initial values
     * [Pull request #2132](https://github.com/gazebosim/gz-sim/pull/2132)