README: update

Author: egor-tensin

README.md

@@ -58,19 +58,20 @@ The `version` parameter value is not checked for being an available version for
 the current distribution.
 The supported versions for a particular distribution are those found in that
 distro's repositories & those in the PPA.
-For example, the supported versions for Bionic & Focal as of July 2021 are
-listed below.
-
-| `version` | Bionic | Focal
-| --------- | ------ | -----
-| 4.8       | ✓      |
-| 5         | ✓      |
-| 6         | ✓      |
-| 7         | ✓      | ✓
-| 8         | ✓      | ✓
-| 9         | ✓      | ✓
-| 10        | ✓      | ✓
-| 11        | ✓      | ✓
+For example, you can find the list of available versions as of January 2023
+below.
+
+| `version` | Bionic | Focal | Jammy
+| --------- | ------ | ----- | -----
+| 4.8       | ✓      |       |
+| 5         | ✓      |       |
+| 6         | ✓      |       |
+| 7         | ✓      | ✓     |
+| 8         | ✓      | ✓     |
+| 9         | ✓      | ✓     | ✓
+| 10        | ✓      | ✓     | ✓
+| 11        | ✓      | ✓     | ✓
+| 12        |        |       | ✓
 
 This table is not definitive; I expect more future versions to be made
 available, especially for Focal.