Fix a lot of man7 links to be more specific.

Bug: https://github.com/android/ndk/issues/2113
Change-Id: Ifc3add91c39422985c63e895dc32443b8f736c9d
diff --git a/libc/include/sys/select.h b/libc/include/sys/select.h
index 4183d90..685e6ac 100644
--- a/libc/include/sys/select.h
+++ b/libc/include/sys/select.h
@@ -137,7 +137,7 @@
 int select(int __max_fd_plus_one, fd_set* _Nullable __read_fds, fd_set* _Nullable __write_fds, fd_set* _Nullable __exception_fds, struct timeval* _Nullable __timeout);
 
 /**
- * [pselect(2)](https://man7.org/linux/man-pages/man2/select.2.html) waits on a
+ * [pselect(2)](https://man7.org/linux/man-pages/man2/pselect.2.html) waits on a
  * set of file descriptors.
  *
  * New code should prefer ppoll() from <poll.h> instead,