Apply suggestions from code review

Accept review comments.

Co-authored-by: jdef <[email protected]>

Author: gnufied

csi.proto

@@ -396,8 +396,8 @@ message VolumeCapability {
     // SHALL NOT exceed 4 KiB.
     repeated string mount_flags = 2;
 
-    // If SP has VOLUME_MOUNT_GROUP node capability and CO provides
-    // this field then SP MUST ensure that the volume_mount_group
+    // If the SP has VOLUME_MOUNT_GROUP node capability and the CO provides
+    // this field then the SP MUST ensure that the volume_mount_group
     // parameter is passed as the group identifier to the underlying
     // operating system mount system call, with the understanding
     // that the set of available mount call parameters and/or
@@ -1491,7 +1491,7 @@ message NodeServiceCapability {
       VOLUME_CONDITION = 4 [(alpha_enum_value) = true];
       // Indicates that Node service supports mounting volumes
       // with provided volume group identifier during NodeStageVolume
-      // or node publish RPC calls.
+      // or NodePublishVolume RPC calls.
       VOLUME_MOUNT_GROUP = 5 [(alpha_enum_value) = true];
     }