chore: added a missing PR link in a comment in the pointpainting launcher

Signed-off-by: Kenzo Lobos-Tsunekawa <kenzo.lobos@tier4.jp>

Author: knzo25

perception/image_projection_based_fusion/launch/pointpainting_fusion.launch.xml

@@ -52,7 +52,7 @@
         <param from="$(var class_remapper_param_path)"/>
         <param name="rois_number" value="$(var input/rois_number)"/>
 
-        <!-- This parameter shall NOT be included in param file. See the PR from the git blame for details. -->
+        <!-- This parameter shall NOT be included in param file. See also: https://github.com/autowarefoundation/autoware.universe/pull/6167 -->
         <param name="build_only" value="$(var build_only)"/>
 
         <!-- rois, camera and info -->
@@ -93,7 +93,7 @@
       <param from="$(var class_remapper_param_path)"/>
       <param name="rois_number" value="$(var input/rois_number)"/>
 
-      <!-- This parameter shall NOT be included in param file. See the PR from the git blame for details. -->
+      <!-- This parameter shall NOT be included in param file. See also: https://github.com/autowarefoundation/autoware.universe/pull/6167 -->
       <param name="build_only" value="$(var build_only)"/>
 
       <!-- rois, camera and info -->