storage: change bucket names

Bucket names were changed in the function, but not in the commentary

Change-Id: If58f4d809cb09a24d2edfa65c7b399c1de89b1ae
Reviewed-on: https://code-review.googlesource.com/c/gocloud/+/53150
Reviewed-by: kokoro <noreply+kokoro@google.com>
Reviewed-by: Cody Oss <codyoss@google.com>
Reviewed-by: Frank Natividad <franknatividad@google.com>
Reviewed-by: Chris Cotter <cjcotter@google.com>
diff --git a/storage/integration_test.go b/storage/integration_test.go
index 37fdfcb..20e78d7 100644
--- a/storage/integration_test.go
+++ b/storage/integration_test.go
@@ -1986,10 +1986,10 @@
 	}
 
 	// Call f under various conditions.
-	// Here b and ob refer to the same bucket, but b is bound to client,
-	// while ob is bound to otherClient. The clients differ in their credentials,
-	// i.e. the identity of the user making the RPC: b's user is an Owner on the
-	// bucket's containing project, ob's is not.
+	// Here b1 and b2 refer to the same bucket, but b1 is bound to client,
+	// while b2 is bound to otherClient. The clients differ in their credentials,
+	// i.e. the identity of the user making the RPC: b1's user is an Owner on the
+	// bucket's containing project, b2's is not.
 	call := func(msg string, f func(*BucketHandle) error) {
 		// user: an Owner on the containing project
 		// userProject: absent