Update humble CI

Author: 4ntn

.github/workflows/ci.yml

@@ -7,7 +7,7 @@ on:
 
 jobs:
     micro_ros_demos:
-        runs-on: ubuntu-20.04
+        runs-on: ubuntu-22.04
         container: microros/base:humble
         defaults:
           run:
@@ -24,7 +24,7 @@ jobs:
             rosdep update
             ros2 run micro_ros_setup create_firmware_ws.sh host
             rm -rf src/uros/micro-ROS-demos
-        - uses: actions/checkout@v2
+        - uses: actions/checkout@v4
           with:
             path: uros_ws/src/uros/micro-ROS-demos
         - name: Build