highlight conf format (#70)

Author: wey-gu

nebula-algorithm/src/main/resources/application.conf

@@ -1,5 +1,6 @@
 {
-  # Spark relation config
+  # the format of this file is HOCON, you could parse and mutate it with https://github.com/chimpler/pyhocon
+  # Spark related config
   spark: {
     app: {
         name: LPA
@@ -18,7 +19,7 @@
     hasWeight: false
   }
 
-  # Nebula Graph relation config
+  # NebulaGraph related config
   nebula: {
     # algo's data source from Nebula. If data.source is nebula, then this nebula.read config can be valid.
     read: {