port_def: Ignore `-Wpedantic` warnings

Fixes `extra ';' [-Wpedantic]` warnings in generated `.pb` headers.

src/google/protobuf/port_def.inc

@@ -1087,6 +1087,8 @@ static_assert(PROTOBUF_ABSL_MIN(20230125, 3),
 #pragma GCC diagnostic ignored "-Wstringop-overflow"
 // This causes spurious warnings in GCC 13.
 #pragma GCC diagnostic ignored "-Wself-move"
+// Ignore warning: extra ';' [-Wpedantic]
+#pragma GCC diagnostic ignored "-Wpedantic"
 #endif
 #if __GNUC__ == 12 && __GNUC_MINOR__ < 4
 // Wrong warning emitted when assigning a single char c-string to a std::string