Update .asf.yaml

.asf.yaml

@@ -16,7 +16,7 @@
 #
 
 github:
-    description: APM, Application Performance Monitoring System
+    description: The Nginx Lua agent for Apache SkyWalking
     homepage: https://skywalking.apache.org/
     labels:
       - skywalking
@@ -29,4 +29,4 @@ github:
     enabled_merge_buttons:
       squash:  true
       merge:   false
-      rebase:  false  
\ No newline at end of file
+      rebase:  false