Update _index.md

removed all mentions of grid in this paragraph

Author: Kemi-Elizabeth

sites/upsun/src/manage-resources/_index.md

@@ -20,7 +20,7 @@ For information on costs related to resource usage, see the [{{% vendor/name %}}
 
 ## How resources work on Upsun
 
-Projects on Upsun run on shared Grid hosts, which means the processing power allocated to your containers can be dependent on resources other customers are using on the same Grid hosts. Our orchestration layer works to ensure stable access to resources when possible, however some variability should be expected due to the shared infrastructure of our Grid regions.
+Projects on Upsun run on shared hosts, which means the processing power allocated to your containers can be dependent on resources other customers are using on the same hosts. Our orchestration layer works to ensure stable access to resources when possible, however some variability should be expected due to the shared infrastructure of our regions.
 
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