Fixing Grammatical Error

[Vyshnav Ajith <puthen1977@gmail.com>]

'Worst case' being singular needs 'is' instead of 'are'.

Signed-off-by: Vyshnav Ajith <puthen1977@gmail.com>
---
 Documentation/usb/dwc3.rst | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/Documentation/usb/dwc3.rst b/Documentation/usb/dwc3.rst
index f94a7ba16573..12989d126a8a 100644
--- a/Documentation/usb/dwc3.rst
+++ b/Documentation/usb/dwc3.rst
@@ -20,7 +20,7 @@ Please pick something while reading :)
     to the device. If MSI provides per-endpoint interrupt this dummy
     interrupt chip can be replaced with "real" interrupts.
   - interrupts are requested / allocated on usb_ep_enable() and removed on
-    usb_ep_disable(). Worst case are 32 interrupts, the lower limit is two
+    usb_ep_disable(). The worst case is 32 interrupts, the lower limit is two
     for ep0/1.
   - dwc3_send_gadget_ep_cmd() will sleep in wait_for_completion_timeout()
     until the command completes.
-- 
2.43.0