docs: Fix broken image url and obsolete CI

Author: j3soon

.github/workflows/build-rtabmap-ws.yaml

@@ -83,19 +83,16 @@ docker compose down
 - After you've run the demo, you could find the following result directly.
 
 1. LiDAR test
-<center>
-  <img src="assets/rtabmap_lidar_test.png" width="75%"/>
-</center>
+
+  ![](assets/rtabmap_lidar_test.png)
 
 2. RGBD test
-<center>
-  <img src="assets/rtabmap_rgbd_test.png" width="75%"/>
-</center>
+
+   ![](assets/rtabmap_rgbd_test.png)
 
 3. Dual sensor test
-<center>
-  <img src="assets/rtabmap_dual_test.png" width="75%"/>
-</center>
+
+   ![](assets/rtabmap_dual_test.png)
 
 ## Reference
 

docs/docker-modules/rtabmap.md

@@ -122,9 +122,9 @@ plugins:
   # Ref: https://squidfunk.github.io/mkdocs-material/setup/adding-a-git-repository/#document-contributors
   # Ref: https://github.com/ojacques/mkdocs-git-committers-plugin-2
   # Ref: https://github.com/ojacques/mkdocs-git-committers-plugin-2/issues/51#issuecomment-1951450239
-  - git-committers:
-      repository: j3soon/ros2-essentials
-      branch: main
+  # - git-committers:
+  #     repository: j3soon/ros2-essentials
+  #     branch: main
   # DONE (Set up git contributors):
   # - Replace the `git-committers` settings above to match your repository.
   # - Generate a GitHub API key as described in the link above.