maintainers: add govindsi

Signed-off-by: Govind Singh <govind.sk85@gmail.com>

Author: govindsi

maintainers/maintainer-list.nix

@@ -9705,6 +9705,12 @@
     githubId = 6375438;
     keys = [ { fingerprint = "5214 2D39 A7CE F8FA 872B  CA7F DE62 E1E2 A614 5556"; } ];
   };
+  govindsi = {
+    email = "govind.sk85@gmail.com";
+    github = "govindsi";
+    githubId = 8924200;
+    name = "Govind Singh";
+  };
   gp2112 = {
     email = "me@guip.dev";
     github = "gp2112";