Fix changes indent to pass the sphinx build

Author: bsipocz

CHANGES.rst

@@ -8,16 +8,15 @@ gaia
 ^^^^
 
 - TAP notifications service is now available for Gaia. If there is notification for the users,
-e.g planned or our unplanned downtimes of the archive, etc. The notification
-will be also visible when accessing the archive through Astroquery. [#2376]
+  for example planned or our unplanned downtimes of the archive, etc. The notification
+  will be also visible when accessing the archive through Astroquery. [#2376]
 
 hsa
 ^^^
 
 - New module to access ESA Herschel mission. [#2122]
 
 
-
 Service fixes and enhancements
 ------------------------------
 
@@ -61,8 +60,8 @@ gaia
 ^^^^
 
 - Method 'load_data' now has the parameter 'valid_data' set to False by default.
-With this change the epoch photometry service returns all data associated to
-a given source. [#2376]
+  With this change the epoch photometry service returns all data associated
+  to a given source. [#2376]
 
 
 Infrastructure, Utility and Other Changes and Additions