[9.1](backport #5700) build(deps): bump github.com/elastic/elastic-agent-system-metrics from 0.13.2 to 0.13.3#5703

ebeahan merged 3 commits into9.1elastic/fleet-server:9.1from

mergify/bp/9.1/pr-5700elastic/fleet-server:mergify/bp/9.1/pr-5700Copy head branch name to clipboard