docs: Revert ChecksummedData message definition not to specify ctype=CORD,

Google APIs · copybara-github · commit c0b5730937e5 · 2023-03-30T08:34:00.000-07:00
because it would be a breaking change.

PiperOrigin-RevId: 520647425
diff --git a/google/storage/v2/storage.proto b/google/storage/v2/storage.proto
@@ -2015,7 +2015,7 @@ message BucketAccessControl {
 // checksum.
 message ChecksummedData {
   // The data.
-  bytes content = 1 [ctype = CORD];
+  bytes content = 1;
 
   // If set, the CRC32C digest of the content field.
   optional fixed32 crc32c = 2;
