chore(deps): update prom/prometheus docker digest to 4a61322 (#1036)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

prometheus/docker-compose.yml

@@ -4,7 +4,7 @@ services:
     ports:
       - '19090:19090'
   prometheus:
-    image: prom/prometheus@sha256:1f0f50f06acaceb0f5670d2c8a658a599affe7b0d8e78b898c1035653849a702
+    image: prom/prometheus@sha256:4a61322ac1103a0e3aea2a61ef1718422a48fa046441f299d71e660a3bc71ae9
     volumes:
       - ./prometheus.yml:/etc/prometheus/prometheus.yml
     depends_on: