Update statuses of unsupported versions (#454)

V4 and V5 are unsupported, we need to update the table to reflect that.

README.md

@@ -59,8 +59,8 @@ This SDK abides by our Client SDK Deprecation Policy. For more information on th
 | Major version number | Status | Released | Deprecated | Unsupported |
 | -------------------- | ------ | -------- | ---------- | ----------- |
 | 6.x.x | Active | November 2021 | TBA | TBA |
-| 5.x.x | Inactive | September 2020 | November 2022 | November 2023 |
-| 4.x.x | Deprecated | February 2019 | September 2021 | September 2022 |
+| 5.x.x | Unsupported | September 2020 | November 2022 | November 2023 |
+| 4.x.x | Unsupported | February 2019 | September 2021 | September 2022 |
 
 Versions 3 and below are unsupported.