Use official freetype github mirror instead of savannah (#1348)

Signed-off-by: Silvio Traversaro <[email protected]>

Author: traversaro

rviz_ogre_vendor/CMakeLists.txt

@@ -14,7 +14,7 @@ if(WIN32)
   endif()
 
   ament_vendor(freetype_vendor
-    VCS_URL https://git.savannah.gnu.org/git/freetype/freetype2.git
+    VCS_URL https://github.com/freetype/freetype.git
     VCS_VERSION VER-2-13-2
     CMAKE_ARGS
       -DFT_DISABLE_ZLIB:BOOL=ON