form-letters: update net-next-closed for 6.6

Signed-off-by: Jakub Kicinski <[email protected]>

Author: kuba-moo

form-letters/net-next-closed

@@ -1,8 +1,8 @@
-The merge window for v6.5 has begun and therefore net-next is closed
+The merge window for v6.6 has begun and therefore net-next is closed
 for new drivers, features, code refactoring and optimizations.
 We are currently accepting bug fixes only.
 
-Please repost when net-next reopens after July 10th.
+Please repost when net-next reopens after Sept 11th.
 
 RFC patches sent for review only are obviously welcome at any time.