fix typo

index.bs

@@ -622,7 +622,7 @@ The <dfn method for=FileSystemFileHandle>createSyncAccessHandle()</dfn> method s
 1. Let |locator| be [=this=]'s [=FileSystemHandle/locator=].
 1. Let |realm| be [=this=]'s [=relevant Realm=].
 1. Let |global| be [=this=]'s [=relevant global object=].
-1. Let |isInAnBucketFileSystem| be true if
+1. Let |isInABucketFileSystem| be true if
    [=this=] [=FileSystemHandle/is in a bucket file system=];
    otherwise false.
 1. [=Enqueue the following steps=] to the [=file system queue=]:
@@ -635,7 +635,7 @@ The <dfn method for=FileSystemFileHandle>createSyncAccessHandle()</dfn> method s
      |accessResult|'s [=file system access result/error name=] and
      abort these steps.
 
-  1. If |isInAnBucketFileSystem| is false,
+  1. If |isInABucketFileSystem| is false,
      [=queue a storage task=] with |global| to
      [=/reject=] |result| with an "{{InvalidStateError}}" {{DOMException}} and
      abort these steps.