fix(create-prs-to-update-vcs-repositories): fix wrong plaintext annot…

…ation

Signed-off-by: Junya Sasaki <[email protected]>

create-prs-to-update-vcs-repositories/README.md

@@ -80,8 +80,7 @@ None.
         "2.0.1-alpha.1227",     # mismatch
         "1.0.0-alpha.beta",     # mismatch
         "ros_humble-v0.10.2"    # mismatch
-
-````
+```
 
 ## What kind of version update is possible?
 
@@ -92,16 +91,12 @@ None.
     0.0.1  =>  0.0.2
     1.1.1  =>  1.2.1
     2.4.3  =>  3.0.0
-
-````
+```
 
   - Invalid ones (PR is not created):
 ```plaintext
     main       =>  0.0.1
     v0.0.1     =>  0.0.2
     xxx-0.0.1  =>  0.0.9
     0.0.1-rc1  =>  0.0.2
-
-```
-
 ```