bugfix: fix activity icon #60

Job	Run time
ci / check if job needs to run	5s
ci / prepare test matrix	18s
ci / MOODLE_401_STABLE - pgsql - php 7.4 - mod_hvp	3m 14s
ci / MOODLE_400_STABLE - pgsql - php 7.3 - mod_hvp	3m 21s
ci / MOODLE_401_STABLE - mariadb - php 7.4 - mod_hvp	3m 16s
ci / MOODLE_401_STABLE - pgsql - php 8.0 - mod_hvp	3m 25s
ci / MOODLE_401_STABLE - mariadb - php 8.0 - mod_hvp	3m 27s
ci / MOODLE_402_STABLE - pgsql - php 8.0 - mod_hvp	3m 12s
ci / MOODLE_402_STABLE - mariadb - php 8.0 - mod_hvp	3m 9s
ci / MOODLE_402_STABLE - pgsql - php 8.1 - mod_hvp	3m 11s
ci / MOODLE_402_STABLE - mariadb - php 8.1 - mod_hvp	3m 0s
ci / MOODLE_403_STABLE - pgsql - php 8.0 - mod_hvp	3m 12s
ci / MOODLE_403_STABLE - mariadb - php 8.0 - mod_hvp	3m 13s
ci / MOODLE_403_STABLE - pgsql - php 8.2 - mod_hvp	3m 11s
ci / MOODLE_403_STABLE - mariadb - php 8.2 - mod_hvp	3m 0s
ci / MOODLE_404_STABLE - pgsql - php 8.1 - mod_hvp	3m 35s
ci / MOODLE_404_STABLE - mariadb - php 8.1 - mod_hvp	3m 18s
ci / MOODLE_404_STABLE - pgsql - php 8.3 - mod_hvp	3m 9s
ci / MOODLE_404_STABLE - mariadb - php 8.3 - mod_hvp	3m 6s
ci / Release to the Moodle plugin directory	0s
	55m 22s

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