updated flake to have correct sha for vendoring and updated README to render properly

flake.nix

@@ -45,7 +45,7 @@
                 name = "source";
                 path = ./.;
               };
-              vendorHash = "";
+              vendorHash = "sha256-3ZGIzksxYjZBIlEzvzmsju5GVcusHAfz9pBgeARgzyA=";
             }
           ) { };
         }