Update protobuf.js

source/protobuf.js

@@ -1311,7 +1311,7 @@ protobuf.Error = class extends Error {
 
     constructor(message) {
         super(message);
-        this.name = 'Protocol Buffer Error';
+        this.name = 'Protocol Buffers Error';
         this.message = message;
     }
 };

tools/protoc.js

@@ -1483,7 +1483,7 @@ protoc.Error = class extends Error {
 
     constructor(message) {
         super(message);
-        this.name = 'Protocol Buffer Compiler Error';
+        this.name = 'Protocol Buffers Compiler Error';
     }
 };