MAINT: update date, fix headings and typo

Author: bsipocz

documentation/index.md

@@ -1,14 +1,12 @@
 # SPHEREx Archive at IRSA User Guide
-Last updated 13 June 2025
+Last updated 1 July 2025
 
 
 
-## Introduction
-
-### Document Purpose and Scope
+## Document Purpose and Scope
 The purpose of this document is to facilitate science with SPHEREx data by providing users with an overview of the SPHEREx data that are available at the NASA/IPAC Infrared Science Archive (IRSA) at Caltech, as well as instructions for accessing and downloading these data. We also provide tips for exploring the data and getting help with any questions you may have. This User Guide will evolve as the SPHEREx project delivers new data products and tools to IRSA to make available to the public.
 
-### SPHEREx Overview
+## SPHEREx Overview
 
 SPHEREx is a NASA Astrophysics Medium Explorer mission that launched in March 2025. During its planned two-year mission, SPHEREx will obtain 0.75-5 micron spectroscopy over the entire sky, with deeper data in the SPHEREx Deep Fields. SPHEREx data will be used to:
 
@@ -24,16 +22,17 @@ More information is available in the "Mission Overview" section of the SPHEREx E
 ```{toctree}
 ---
 maxdepth: 1
-caption: SHEREx Data at IRSA
+caption: SPHEREx Data at IRSA
 ---
 
 
 spherex_data_products
+
 spherex_data_access
 ```
 
 
-### Additional Resources
+## Additional Resources
 
 [SPHEREx archive at IRSA](https://irsa.ipac.caltech.edu/Missions/spherex.html)