Update comments and fix typo

Signed-off-by: Tim Liu <[email protected]>

.github/workflows/auto-merge.yml

@@ -42,9 +42,11 @@ jobs:
           git config user.email "[email protected] "
           git fetch origin ${HEAD} ${BASE}
           git checkout -b ${INTERMEDIATE_HEAD} origin/${HEAD}
-          # Use commits from HEAD, but keek submodule files(FILE_USE_BASE) from BASE
+          # Sync the $BASE branch with the commits from the $HEAD branch,
+          # excluding the paths defined as $FILE_USE_BASE (located under ./thirdparty).
           git checkout origin/${BASE} -- ${FILE_USE_BASE}
-          # If any submodule file is updaged from HEAD, always change to BASE ones
+          # If any submodule file is updated in the HEAD branch,
+          # always change it to the corresponding one from the BASE branch.
           [ ! -z "$(git status --porcelain=v1 --untracked=no)" ] && \
             git commit -s -am "Auto-merge use ${BASE} versions"
           git push origin ${INTERMEDIATE_HEAD} -f