Use PR title and description for commit message (#7563)

Closes #7562

Author: kou

.asf.yaml

@@ -16,7 +16,7 @@
 # under the License.
 
 # Documentation can be found here:
-# https://cwiki.apache.org/confluence/pages/viewpage.action?pageId=127405038
+# https://github.com/apache/infrastructure-asfyaml/blob/main/README.md
 
 notifications:
   commits:      [email protected]
@@ -33,6 +33,7 @@ github:
     - rust
   enabled_merge_buttons:
     squash: true
+    squash_commit_message: PR_TITLE_AND_DESC
     merge: false
     rebase: false
   features: