message: Change shared object to data store in architecture diagram in ff.com docs
  The Shared Object is being changed to Data Store to reflect what that concept is called in the codebase. Updating the architecture diagram accordingly.
diff: @@ -14,7 +14,7 @@ level, identify the important lower level concepts, and discuss some of our key
  The Fluid loader connects to the Fluid service and loads a Fluid container.
  ```goat
  -+-----Client----------------------------------------------------------------+
  ++-----Client (or Host)------------------------------------------------------+
  | |
  | +----------------------------------------------------------------------+ |
  | | Fluid Loader | |
  @@ -34,7 +34,7 @@ The Fluid loader connects to the Fluid service and loads a Fluid container.
  | | +--------------------------+ +----------------+ +----------------+ | | +---------------------+
  | | | | | | | | | | | |
  | | | | | | | | | | | Fluid Service |
  -| | | Shared Object | | Shared Object | | Shared Object | | | | |
  +| | | Data Store | | Data Store | | Data Store | | | | |
  | | | | | | | | | | +---------------------+
  | | | | | | | | | |
  | | | | | | | | | |
  