update README.md

Signed-off-by: meliketanrikulu <melike@leodrive.ai>

Author: meliketanrikulu

localization/autoware_pose_covariance_modifier_node/README.md

@@ -10,13 +10,16 @@ to the error values coming from GNSS, it also manages situations where GNSS and
 
 ## Flowchart
 
-Default Autoware Pose Source is only NDT:
+- Default Autoware Pose Source is only NDT:
+<p align="center">
+<img src="./media/new_proposal-original.drawio.png" width="320">
+</p>
 
-![new_proposal-original.drawio.png](..%2F..%2F..%2F..%2F..%2F..%2F..%2FDocuments%2Fnew_proposal-original.drawio.png)
+- You can see how autoware_pose_covariance_modifier_node works in the diagram below:  
 
-You can see how autoware_pose_covariance_modifier_node works in the diagram below:
-
-![new_proposal-proposal.drawio.png](..%2F..%2F..%2F..%2F..%2F..%2F..%2FDocuments%2Fnew_proposal-proposal.drawio.png)
+<p align="center">
+<img src="./media/new_proposal-proposal.drawio.png" width="620">
+</p>
 
 ## Activate This Feuture
 
@@ -54,3 +57,4 @@ To activate, you need to change the `use_autoware_pose_covariance_modifier` para
 ### Important Notes
 
 - In order to use this package, your GNSS sensor must provide you with the error value. If you do not have a GNSS sensor that provides you with the error value, you cannot use this package.
+- You need to use this package with georeferenced map