bump librdkafka version

olegrok · olegrok · commit 178a22aea7e4 · 2022-06-08T20:49:02.000+03:00
Just to be sure that nothing is broken since last update.
diff --git a/librdkafka b/librdkafka
@@ -1 +1 @@
-Subproject commit f7f527d8f2ff7f5bd86856ddc43115eb4dfbba97
+Subproject commit b47da0e4eec900d9cb091d2f524e957505dbb513
