Updated Feature Matrix (markdown)

Feature-Matrix.md

@@ -91,11 +91,11 @@
 | isMember                           | ✅ | ✅ | ✅
 | isRegistered                       | ✅ | ✅ | ✅
 
-# With Attachment Data<sup>5, 9</sup>
+# With Attachment Data<sup>5</sup>
 | feature | plaintext CLI | json CLI<sup>8</sup> | dbus |
 |---------|:-------------:|:--------:|------|
 | content                            | ✅ | ✅ | ✅
-| thumbnail                          | ✅ | ✅ | ❔
+| thumbnail<sup>9</sup>              | ✅ | ✅ | ❔
 | contentType                        | ✅ | ✅ | ✅<sup>1, 6</sup>
 | filename                           | ✅ | ✅ | ✅<sup>1</sup>
 | remoteId                           | ✅ | ✅ | ✅<sup>1, 6</sup>
@@ -136,7 +136,7 @@
 | id                                 | ✅ | ✅ | ❔
 | author                             | ✅ | ✅ | ❔
 | text                               | ✅ | ✅ | ❔
-| attachments                        | ✅ | ✅ | ❔
+| attachments<sup>9</sup>            | ✅ | ✅ | ❔
 
 # Notes
 1. Proposed <https://github.com/johnfreed/signal-cli>
@@ -147,7 +147,7 @@
 6. Provided indirectly by interpreting content file written to disk
 7. Obsolete (no longer part of Signal 
 8. `--output json` option is supported by CLI
-9. A thumbnail has the data of an attachment, but can also be part of a quoted attachment
+9. A thumbnail has the data of an attachment, but is also part of a quoted attachment
 10. updateContact is implemented indirectly through two subcommands: setContactName and setExpirationTimer
 11. Attachments are written to disk, with remoteId sent over DBus