Bump Alpine to version 3.20.2

This fixes a security vulnerability.

release=3.3
stack=alpine

Author: tarleb

versions.md

@@ -1,7 +1,7 @@
 | pandoc   | tags                          | Alpine | Ubuntu | TeXLive | Lua |
 |----------+-------------------------------+--------+--------+---------+-----|
-| main     | edge                          | 3.20.1 | noble  |         | 5.4 |
-| 3.3      | 3.3.0.0  3.3.0  3.3  3 latest | 3.20.1 | noble  |    2024 | 5.4 |
+| main     | edge                          | 3.20.2 | noble  |         | 5.4 |
+| 3.3      | 3.3.0.0  3.3.0  3.3  3 latest | 3.20.2 | noble  |    2024 | 5.4 |
 | 3.2.1    | 3.2.1.0  3.2.1  3.2           | 3.19.2 | noble  |    2024 | 5.4 |
 | 3.1.13   | 3.1.13.0 3.1.13 3.1           | 3.19.2 | noble  |    2024 | 5.4 |
 | 3.1.1    | 3.1.1.0  3.1.1                | 3.16.9 | jammy  |    2022 | 5.4 |