[doc] Update default value for gpuAggregation option (#9748)

Author: chrisgervang

docs/README.md

@@ -3,8 +3,8 @@
 <p align="center">
   These docs are for
   &nbsp;
-  <a href="https://github.com/visgl/deck.gl/blob/9.0-release/docs/README.md">
-    <img src="https://img.shields.io/badge/deck.gl-v9.0-brightgreen.svg?style=flat-square" />
+  <a href="https://github.com/visgl/deck.gl/blob/9.1-release/docs/README.md">
+    <img src="https://img.shields.io/badge/deck.gl-v9.1-brightgreen.svg?style=flat-square" />
   </a>
   <br />
   Looking for an old version?

docs/api-reference/aggregation-layers/grid-layer.md

@@ -170,7 +170,7 @@ Inherits from all [Base Layer](../core/layer.md) and [CompositeLayer](../core/co
 
 #### `gpuAggregation` (boolean, optional) {#gpuaggregation}
 
-* Default: `false`
+* Default: `true`
 
 When set to `true`, aggregation is performed on the GPU. 
 

docs/api-reference/aggregation-layers/hexagon-layer.md

@@ -170,7 +170,7 @@ Inherits from all [Base Layer](../core/layer.md) and [CompositeLayer](../core/co
 
 #### `gpuAggregation` (boolean, optional) {#gpuaggregation}
 
-* Default: `false`
+* Default: `true`
 
 When set to `true`, aggregation is performed on the GPU.