Update spherex_intro.md

updated links to explanatory supplement

Author: vandesai1

documentation/spherex_intro.md

@@ -13,7 +13,7 @@ SPHEREx is a NASA Astrophysics Medium Explorer mission that launched in March 20
 
 The community will also mine SPHEREx data and combine it with synergistic data sets to address a variety of additional topics in astrophysics.
 
-More information is available in the "Mission Overview" section of the [SPHEREx Explanatory Supplement](https://irsa.ipac.caltech.edu/data/SPHEREx/docs/spherex_explanatory_supplement.pdf).
+More information is available in the "Mission Overview" section of the [SPHEREx Explanatory Supplement](https://irsa.ipac.caltech.edu/data/SPHEREx/docs/SPHEREx_Expsupp_QR_v1.0.pdf).
 
 ### Additional Resources
 
@@ -23,4 +23,4 @@ https://irsa.ipac.caltech.edu/Missions/spherex.html
 SPHEREx project website: https://spherex.caltech.edu/
 
 SPHEREx Explanatory Supplement:
-https://irsa.ipac.caltech.edu/data/SPHEREx/docs/spherex_explanatory_supplement.pdf
+https://irsa.ipac.caltech.edu/data/SPHEREx/docs/SPHEREx_Expsupp_QR_v1.0.pdf