gomatrix: use sri hash

pkgs/applications/misc/gomatrix/default.nix

···
     owner = "GeertJohan";
     repo = "gomatrix";
     rev = "v${version}";
-    sha256 = "1wq55rvpyz0gjn8kiwwj49awsmi86zy1fdjcphzgb7883xalgr2m";
+    hash = "sha256-VeRHVR8InfU+vEw2F/w3KFbNVSKS8ziRlQ98f3cuBfM=";
   };
 
-  vendorSha256 = "1yw0gph4zfg8w4343882l6b9lggwyak2zz8ic1l1m2m44p3aq169";
+  vendorHash = "sha256-yQSsxiWkihpoYBH9L6by/D2alqECoUEG4ei5T+B9gPs=";
 
   doCheck = false;