Add reference to documentation, clean up comments in .asf.yaml and make merge button configuration consistent with required_linear_history

Author: jacopoc

.asf.yaml

@@ -13,6 +13,11 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 
+# This file is used to configure ASF GitHub repositories.
+# It is used by the ASF GitHub bot to automate various tasks such as labeling,
+# merging, and notifications.
+# For more information, see https://github.com/apache/infrastructure-asfyaml/blob/main/README.md
+
 github:
   description: "Apache OFBiz is an open source product for the automation of enterprise processes. It includes framework components and business applications for ERP, CRM, E-Business/E-Commerce, Supply Chain Management and Manufacturing Resource Planning. OFBiz provides a foundation and starting point for reliable, secure and scalable enterprise solutions."
   homepage: https://ofbiz.apache.org/
@@ -32,20 +37,13 @@ github:
     - content
     - geospatial
     - hacktoberfest
+  
   enabled_merge_buttons:
-    # enable squash button:
+    merge: false
+    rebase: true
     squash: true
-    # default commit message when merging with a squash commit
-    # can either be: DEFAULT | PR_TITLE | PR_TITLE_AND_COMMIT_DETAILS | PR_TITLE_AND_DESC
     squash_commit_message: PR_TITLE_AND_DESC
-    # enable merge button:
-    merge: true
-    # default commit message when merging with a merge commit
-    # can either be: DEFAULT | PR_TITLE | PR_TITLE_AND_DESC
-    merge_commit_message: PR_TITLE_AND_DESC
-    # enable rebase button:
-    rebase: true
-
+  
   rulesets:
     - name: "Default Branch Protection"
       type: branch