man/io_uring_setup.2: correct 5.10 -> 5.11 for non-fixed files and SQPOLL

Signed-off-by: Jens Axboe <axboe@kernel.dk>
diff --git a/man/io_uring_setup.2 b/man/io_uring_setup.2
index 647da42..3122313 100644
--- a/man/io_uring_setup.2
+++ b/man/io_uring_setup.2
@@ -116,7 +116,7 @@
 described below.
 .TP
 .BR
-Before version 5.10 of the Linux kernel, to successfully use this feature, the
+Before version 5.11 of the Linux kernel, to successfully use this feature, the
 application must register a set of files to be used for IO through
 .BR io_uring_register (2)
 using the