update calamares configs

acorinstaller/calamares/modules/services-systemd.conf

@@ -0,0 +1,13 @@
+# SPDX-FileCopyrightText: no
+# SPDX-License-Identifier: CC0-1.0
+#
+# Systemd services manipulation.
+#
+# This module can enable services, timers and targets for systemd
+# (if packaging doesn't already do that). It can also
+# disable services and targets as well as mask units.
+
+timers:
+   - name: "fstrim"
+     mandatory: false
+