message: using stringToBuffer() in readBlob to return arrayBufferLike
diff: @@ -12,6 +12,7 @@ import {
  fromUtf8ToBase64,
  IsoBuffer,
  performance,
  + stringToBuffer,
  } from "@fluidframework/common-utils";
  import {
  PerformanceEvent,
  @@ -392,7 +393,7 @@ export class OdspDocumentStorageService implements IDocumentStorageService {
  if (blob instanceof ArrayBuffer) {
  return blob;
  }
  - return IsoBuffer.from(blob.content, blob.encoding ?? "utf-8").buffer;
  + return stringToBuffer(blob.content, blob.encoding ?? "utf8");
  }
  public async read(blobId: string): Promise<string> {
  