add vertica to data sources

Author: timbrownls20

docs/pages/product/configuration/data-sources.mdx

@@ -54,6 +54,11 @@ sources][ref-config-multi-data-src] out of the box.
     imageUrl="https://static.cube.dev/icons/firebolt.svg"
     title="Firebolt"
   />
+   <GridItem
+    url="data-sources/vertica"
+    imageUrl="https://static.cube.dev/icons/vertica.svg"
+    title="Vertica"
+  />
 </Grid>
 
 ## Query engines