fix(deps): update module github.com/prometheus/client_golang to v1.20.1

Author: renovate[bot]

core/go.mod

@@ -13,7 +13,7 @@ require (
 	github.com/fsnotify/fsnotify v1.7.0
 	github.com/open-feature/flagd-schemas v0.2.9-0.20240708163558-2aa89b314322
 	github.com/open-feature/open-feature-operator/apis v0.2.44
-	github.com/prometheus/client_golang v1.19.1
+	github.com/prometheus/client_golang v1.20.1
 	github.com/robfig/cron v1.2.0
 	github.com/stretchr/testify v1.9.0
 	github.com/twmb/murmur3 v1.1.8

flagd-proxy/go.mod

@@ -10,7 +10,7 @@ require (
 	github.com/dimiro1/banner v1.1.0
 	github.com/mattn/go-colorable v0.1.13
 	github.com/open-feature/flagd/core v0.10.1
-	github.com/prometheus/client_golang v1.19.1
+	github.com/prometheus/client_golang v1.20.1
 	github.com/spf13/cobra v1.8.1
 	github.com/spf13/viper v1.19.0
 	go.opentelemetry.io/otel/exporters/prometheus v0.50.0

flagd/go.mod

@@ -13,7 +13,7 @@ require (
 	github.com/gorilla/mux v1.8.1
 	github.com/mattn/go-colorable v0.1.13
 	github.com/open-feature/flagd/core v0.10.1
-	github.com/prometheus/client_golang v1.19.1
+	github.com/prometheus/client_golang v1.20.1
 	github.com/rs/cors v1.11.0
 	github.com/rs/xid v1.5.0
 	github.com/spf13/cobra v1.8.1