reflect comments

Signed-off-by: zeroalphat <[email protected]>

.github/workflows/maintenance.md

@@ -10,11 +10,15 @@
 NecoPerf supports one Flatcar Linux version at a time.
 If a new stable version of Flatcar Linux is released, please do the following steps.
 
-- Check the [stable release](https://www.flatcar.org/releases) of Flatcar Linux
-- Find the tags for the container image of the [flatcar-sdk-amd64](https://github.com/orgs/flatcar/packages/container/package/flatcar-sdk-amd64) corresponding to the stable version of Flatcar Linux
-- Update `FLATCAR_VERSION` in `Makefile.versions`.
-
-If Flatcar Container Linux Container Image has changed, please fix the relevant source code.
+1. Check the [stable release](https://www.flatcar.org/releases) of Flatcar Linux.
+    * e.g. "3602.2.2" is released as Stable.
+2. Find the tags for the container image of the [flatcar-sdk-amd64](https://github.com/orgs/flatcar/packages/container/package/flatcar-sdk-amd64) corresponding to the stable version of Flatcar Linux.
+    * e.g. "3602.0.0" is the corresponding tag.
+    * Note that the container images of the flatcar-sdk-amd64 are not updated as frequently as the Flatcar releases.
+3. Update `FLATCAR_VERSION` in `Makefile.versions`.
+    * e.g. Use "3602.0.0" as `FLATCAR_VERSION`.
+
+If the contents of the container image have changed, especially in terms of the files layout, please update the relevant Dockerfiles.
 
 ## How to update dependencies