prometheus-openldap-exporter: 2.1 -> 2.1.4

ChangeLogs:
* https://github.com/tomcz/openldap_exporter/releases/tag/v2.1.1
* https://github.com/tomcz/openldap_exporter/releases/tag/v2.1.2
* https://github.com/tomcz/openldap_exporter/releases/tag/v2.1.3
* https://github.com/tomcz/openldap_exporter/releases/tag/v2.1.4

pkgs/servers/monitoring/prometheus/openldap-exporter.nix

@@ -2,13 +2,13 @@
 
 buildGoPackage rec {
   pname = "openldap_exporter";
-  version = "2.1";
+  version = "2.1.4";
 
   src = fetchFromGitHub {
     owner = "tomcz";
     repo = pname;
     rev = "v${version}";
-    sha256 = "sha256-Di1GiyVp/hGCFhqxhlqJSucGZK7f/FDDUFtJRaiAZu4=";
+    sha256 = "sha256-G4bTYFm1Zh+7gfSIZnfrPyQ15967ebEzl33pgZu23D4=";
   };
 
   buildFlagsArray = ''