Upgrade prometheus_node_exporter (v1.5.0-4 -> v1.5.0-6)

requirements.yml

@@ -31,7 +31,7 @@
   version: 9b4b088c62b528b73a9a7c93d3109b091dd42ec6
 
 - src: git+https://gitlab.com/etke.cc/roles/prometheus_node_exporter.git
-  version: v1.5.0-4
+  version: v1.5.0-6
 
 - src: git+https://gitlab.com/etke.cc/roles/prometheus_postgres_exporter.git
   version: v0.11.1-2