msg fix

yarn-project/foundation/src/serialize/buffer_reader.ts

@@ -323,7 +323,7 @@ export class BufferReader {
   #rangeCheck(numBytes: number) {
     if (this.index + numBytes > this.buffer.length) {
       throw new Error(
-        `Attempted to read beyond buffer Length. Start index: ${this.index}, Num bytes to read: ${numBytes}, Buffer length: ${this.buffer.length}`,
+        `Attempted to read beyond buffer length. Start index: ${this.index}, Num bytes to read: ${numBytes}, Buffer length: ${this.buffer.length}`,
       );
     }
   }