Downgrade Prometheus (v2.52.1-0 -> v2.52.0-0)

Related to 2c40dfd9b8 (commitcomment-142588565)

It seems like there's no published container image with a 2.52.1 tag
and there's also no Prometheus 2.52.1 release yet.

requirements.yml

@@ -49,7 +49,7 @@
   version: 046004a8cb9946979b72ce81c2526c8033ea8067
   name: postgres_backup
 - src: git+https://github.com/mother-of-all-self-hosting/ansible-role-prometheus.git
-  version: v2.52.1-0
+  version: v2.52.0-0
   name: prometheus
 - src: git+https://github.com/mother-of-all-self-hosting/ansible-role-prometheus-node-exporter.git
   version: v1.8.1-0