Fix request graph icons

Summary: Accidentally switched the icons for hierarchy/clustered modes

Test Plan: yarn dev

Reviewers: vihang, zasgar, philkuz

Reviewed By: vihang

Differential Revision: https://phab.corp.pixielabs.ai/D8728

GitOrigin-RevId: 6b5d3491fe8c13a277139bd1782f1b4a0641b0b8

src/ui/src/containers/live-widgets/graph/request-graph.tsx

@@ -337,7 +337,7 @@ export const RequestGraphWidget = (props: RequestGraphProps) => {
             onClick={toggleHierarchy}
             className={hierarchyEnabled ? classes.enabled : ''}
           >
-            <WorkspacesIcon />
+            <AccountTreeIcon />
           </IconButton>
         </Tooltip>
         <Tooltip title={clusteredMode ? 'Clustered by service' : 'Clustering disabled'}>
@@ -346,7 +346,7 @@ export const RequestGraphWidget = (props: RequestGraphProps) => {
             onClick={toggleMode}
             className={clusteredMode ? classes.enabled : ''}
           >
-            <AccountTreeIcon />
+            <WorkspacesIcon />
           </IconButton>
         </Tooltip>
       </div>