Change to repo.hex.pm, S3 URL is deprecated

core/deps.mk

@@ -538,7 +538,7 @@ endef
 define dep_fetch_hex
 	mkdir -p $(ERLANG_MK_TMP)/hex $(DEPS_DIR)/$1; \
 	$(call core_http_get,$(ERLANG_MK_TMP)/hex/$1.tar,\
-		https://s3.amazonaws.com/s3.hex.pm/tarballs/$1-$(strip $(word 2,$(dep_$1))).tar); \
+		https://repo.hex.pm/tarballs/$1-$(strip $(word 2,$(dep_$1))).tar); \
 	tar -xOf $(ERLANG_MK_TMP)/hex/$1.tar contents.tar.gz | tar -C $(DEPS_DIR)/$1 -xzf -;
 endef