[SOGo][Web] Set URL encryption key in mailcow.conf

data/Dockerfiles/sogo/bootstrap-sogo.sh

@@ -53,7 +53,7 @@ cat <<EOF > /var/lib/sogo/GNUstep/Defaults/sogod.plist
     <key>SOGoURLEncryptionEnabled</key>
     <string>YES</string>
     <key>SOGoURLEncryptionPassphrase</key>
-    <string>${RAND_PASS}</string>
+    <string>${SOGO_URL_ENCRYPTION_KEY}</string>
     <key>OCSAdminURL</key>
     <string>mysql://${DBUSER}:${DBPASS}@%2Fvar%2Frun%2Fmysqld%2Fmysqld.sock/${DBNAME}/sogo_admin</string>
     <key>OCSCacheFolderURL</key>