Add link to hitran.rst from the index and changelog entry

Author: Miguel de Val-Borro

CHANGES

@@ -1,6 +1,7 @@
 0.3.4 (unreleased)
 ------------------
 
+- Added basic HITRAN queries support (#617)
 - Fix #737, an issue with broken ALMA archive tables, via a hack (#775)
 - Add license statements to appropriate places (#776)
 - Correct HEASARC tool, which was sending incorrect data to the server (#774)

docs/index.rst

@@ -170,6 +170,7 @@ These others are functional, but do not follow a common & consistent API:
   ogle/ogle.rst
   open_exoplanet_catalogue/open_exoplanet_catalogue.rst
   cosmosim/cosmosim.rst
+  hitran/hitran.rst
 
 Catalog, Archive, and Other
 ===========================
@@ -254,6 +255,7 @@ above categories.
   splatalogue/splatalogue.rst
   nasa_ads/nasa_ads.rst
   vamdc/vamdc.rst
+  hitran/hitran.rst
 
 
 Developer documentation