misc: bump dhtnet

This fix various deadlock and leaks

GitLab: #991
Change-Id: Ibdb6ceabe593f3609e860c71dd3b1a7ff76c6385

contrib/src/dhtnet/package.json

 {
     "name": "dhtnet",
-    "version": "d7976982d24867c6faaf8103504ec8a10d932fa0",
+    "version": "77331098ff663a5ac54fae7d0bedafe076c575a1",
     "url": "https://review.jami.net/plugins/gitiles/dhtnet/+archive/__VERSION__.tar.gz",
     "deps": [
         "opendht",

contrib/src/dhtnet/rules.mak

 # DHTNET
-DHTNET_VERSION := d7976982d24867c6faaf8103504ec8a10d932fa0
+DHTNET_VERSION := 77331098ff663a5ac54fae7d0bedafe076c575a1
 DHTNET_URL := https://review.jami.net/plugins/gitiles/dhtnet/+archive/$(DHTNET_VERSION).tar.gz
 
 PKGS += dhtnet