package/dovecot: bump version to 2.3.18

Release notes:
https://dovecot.org/pipermail/dovecot-news/2022-February/000470.html

Signed-off-by: Bernd Kuhls <bernd.kuhls@t-online.de>
Signed-off-by: Arnout Vandecappelle (Essensium/Mind) <arnout@mind.be>

package/dovecot/dovecot.hash

@@ -1,5 +1,5 @@
 # Locally computed after checking signature
-sha256  1c67ccccdc81a75007c01dedc02ad608c4d856c60a6b89b9cd246e79f72aa2b8  dovecot-2.3.17.1.tar.gz
+sha256  06e73f668c6c093c45bdeeeb7c20398ab8dc49317234f4b5781ac5e2cc5d6c33  dovecot-2.3.18.tar.gz
 sha256  319a9830aab406109cd67cb45496587566a8123203d66d037b209ca3e13de02a  COPYING
 sha256  dc626520dcd53a22f727af3ee42c770e56c97a64fe3adb063799d8ab032fe551  COPYING.LGPL
 sha256  52b8c95fabb19575281874b661ef7968ea47e8f5d74ba0dd40ce512e52b3fc97  COPYING.MIT

package/dovecot/dovecot.mk

@@ -5,7 +5,7 @@
 ################################################################################
 
 DOVECOT_VERSION_MAJOR = 2.3
-DOVECOT_VERSION = $(DOVECOT_VERSION_MAJOR).17.1
+DOVECOT_VERSION = $(DOVECOT_VERSION_MAJOR).18
 DOVECOT_SITE = https://dovecot.org/releases/$(DOVECOT_VERSION_MAJOR)
 DOVECOT_INSTALL_STAGING = YES
 DOVECOT_LICENSE = LGPL-2.1, MIT, Public Domain, BSD-3-Clause, Unicode-DFS-2015