[skip ci] Fix crypto_ipcrypt_pfx.phpt missing filter extension dependency

Closes GH-24128

Author: piotrkwiecinski

ext/sodium/tests/crypto_ipcrypt_pfx.phpt

@@ -2,6 +2,7 @@
 Check for libsodium ipcrypt prefix-preserving (pfx)
 --EXTENSIONS--
 sodium
+filter
 --SKIPIF--
 <?php
 if (!defined('SODIUM_CRYPTO_IPCRYPT_KEYBYTES')) print "skip libsodium without ipcrypt (requires >= 1.0.21)";