Update Discord Server link

Author: konard

imports/upper-menu.tsx

@@ -226,7 +226,7 @@ export const UpperMenu = memo(({scrollContainer, refMenuButtons, onChangeLanguag
                       colorScheme='teal'
                       target='_blank'
                       aria-label='discord server deep foundation'
-                      href="https://discord.gg/xcTVRAgH9t" 
+                      href="https://discord.gg/deep-foundation" 
                       title='discord server deep foundation'
                       as='a'
                       fontSize='lg'