don't fail if no ght was found

[kminehart]

Requirements

The main branch of grafana-build should be compatible with all active versions of Grafana and Grafana-Enterprise.

• [x] I have tested this against main in Grafana.
• [x] I have tested this against main in Grafana Enterprise.
• [x] I have tested this against all active version branches of Grafana (v10.0.x, v10.1.x, v10.2.x, etc).
• [x] I have tested this against all active version branches of Grafana Enterprise (v10.0.x, v10.1.x, v10.2.x, etc).