fix typo in QNX related comment

Author: hanna-kruppe

signal-hook-registry/src/lib.rs

@@ -181,7 +181,7 @@ impl Slot {
 
  #[cfg(target_os = "nto")]
  let flags = 0;
- // SA_RESTART is supported by qnx https://www.qnx.com/support/knowledgebase.html?id=50130000000SmiD
+ // SA_RESTART is not supported by qnx https://www.qnx.com/support/knowledgebase.html?id=50130000000SmiD
  #[cfg(not(target_os = "nto"))]
  let flags = libc::SA_RESTART;
  // Android is broken and uses different int types than the rest (and different depending on