Merge branch 'upstream-nghttp2' into update-nghttp2

# By nghttp2 upstream
* upstream-nghttp2:
  nghttp2 2022-09-21 (87fef4ab)

Utilities/cmnghttp2/lib/includes/nghttp2/nghttp2ver.h

@@ -29,7 +29,7 @@
  * @macro
  * Version number of the nghttp2 library release
  */
-#define NGHTTP2_VERSION "1.40.0"
+#define NGHTTP2_VERSION "1.50.0"
 
 /**
  * @macro
@@ -37,6 +37,6 @@
  * release. This is a 24 bit number with 8 bits for major number, 8 bits
  * for minor and 8 bits for patch. Version 1.2.3 becomes 0x010203.
  */
-#define NGHTTP2_VERSION_NUM 0x012800
+#define NGHTTP2_VERSION_NUM 0x013200
 
 #endif /* NGHTTP2VER_H */