Use small button

aleksis/apps/chronos/frontend/components/SubstitutionOverview.vue

@@ -61,6 +61,7 @@ import dateSortedIteratorMixin from "../mixins/dateSortedIteratorMixin.js";
               <v-btn
                 color="info"
                 outlined
+                small
                 :to="{ name: 'kolego.absences' }"
               >
                 {{ $t("chronos.substitutions.overview.info_alert.button") }}