Update gaussian.md fixed introduction structure, related to #68

docs.it4i/software/chemistry/gaussian.md

 # Gaussian
 
-Gaussian 16 is the latest in the Gaussian series of programs.
-
-## About Gaussian
+## Introduction
 
 Gaussian provides state-of-the-art capabilities for electronic structure modeling.
 Gaussian provides a wide-ranging suite of the most advanced modeling capabilities available.
@@ -29,7 +27,7 @@ uid=1000(user) gid=1000(user) groups=1000(user),1234(open-0-0),7310(gaussian)
 
 ## Installed Version
 
-Gaussian is available on Salomon, Barbora, and DGX-2 systems in version Gaussian 16 rev. c0.
+Gaussian is available on Salomon, Barbora, and DGX-2 systems in the latest version Gaussian 16 rev. c0.
 
 | Module                                | CPU support | GPU support  | Parallelization | Note                |
 |--------------------------------------|-------------|--------------|-----------------|---------------------|