"Added a short description beside the homepage title"

[SuvigyaSrivastava]

Summary

• Added a small inline text beside "Learn GRASS GIS" on the homepage.
• Ensured it does not disturb the UI while providing useful context.

Why This Change?

• Addresses feedback that the homepage should provide a quick intro to GRASS GIS.
• Helps first-time visitors quickly understand what GRASS GIS is.

Request for Review

• @cwhite911 Can you please review it !

[petrasovaa]

Hmm, maybe more something like this:

--- a/index.qmd
+++ b/index.qmd
@@ -8,5 +8,7 @@ listing:
     categories: true
     filter-ui: [title, categories]
 page-layout: full
+description: |
+  Hands-on tutorials for learning [GRASS GIS](https://grass.osgeo.org), the open source geospatial processing engine.
 title-block-banner: false