Test fix

Author: schmidt-sebastian

packages/firestore/test/unit/api/blob.test.ts

@@ -48,7 +48,7 @@ describe('Blob', () => {
 
   it('Blob throws on invalid Base64 strings', () => {
     expect(() => Blob.fromBase64String('not-base64!')).to.throw(
-      /Failed to construct Blob from Base64 string:/
+      /Failed to construct data from Base64 string:/
     );
   });