do-agent: 3.16.8 -> 3.16.9

pkgs/servers/monitoring/do-agent/default.nix

···
 
 buildGoModule rec {
   pname = "do-agent";
-  version = "3.16.8";
+  version = "3.16.9";
 
   src = fetchFromGitHub {
     owner = "digitalocean";
     repo = "do-agent";
     rev = version;
-    sha256 = "sha256-uMPR1vFu3NMvRyL7PCfjQTGEfUtRiyItOqt4HJ2L+Wo=";
+    sha256 = "sha256-9ZSDBjO28spFymoXBwrJQg7Y17qUfzShcIsmUJBIxyY=";
   };
 
   ldflags = [