Add missing px4_msgs dependency to local installation instructions

Author: hmakelin

docs/vitepress/docs/shared/clone-to-colcon-workspace.md

@@ -4,4 +4,5 @@ Clone latest version of GISNav and dependencies to colcon workspace:
 cd ~/colcon_ws/src
 git clone --branch v0.67.0 https://github.com/hmakelin/gisnav.git
 git clone --branch gimbal-protocol-v2-plugin https://github.com/adinkra-labs/mavros_feature_gimbal-protocol-v2-plugin.git mavros
+git clone --branch release/1.14 https://github.com/px4/px4_msgs.git
 ```