Fix region select width (linode#11374)

Author: abailly-akamai

packages/manager/src/components/RegionSelect/RegionSelect.tsx

@@ -121,7 +121,7 @@ export const RegionSelect = <
         }}
         sx={(theme) => ({
           [theme.breakpoints.up('md')]: {
-            maxWidth: tooltipText ? '458px' : '416px',
+            width: tooltipText ? '458px' : '416px',
           },
         })}
         textFieldProps={{