chore: bump prometheus/client_golang 1.15.1

Author: rluisr

.gitignore

@@ -1 +1,2 @@
+.idea
 mysqlrouter_exporter

go.mod

@@ -4,18 +4,18 @@ go 1.20
 
 require (
 	github.com/jessevdk/go-flags v1.5.0
-	github.com/prometheus/client_golang v1.9.0
+	github.com/prometheus/client_golang v1.15.1
 	github.com/rluisr/mysqlrouter-go v1.1.1
 )
 
 require (
 	github.com/beorn7/perks v1.0.1 // indirect
-	github.com/cespare/xxhash/v2 v2.1.1 // indirect
-	github.com/golang/protobuf v1.4.3 // indirect
-	github.com/matttproud/golang_protobuf_extensions v1.0.1 // indirect
-	github.com/prometheus/client_model v0.2.0 // indirect
-	github.com/prometheus/common v0.15.0 // indirect
-	github.com/prometheus/procfs v0.2.0 // indirect
-	golang.org/x/sys v0.1.0 // indirect
-	google.golang.org/protobuf v1.23.0 // indirect
+	github.com/cespare/xxhash/v2 v2.2.0 // indirect
+	github.com/golang/protobuf v1.5.3 // indirect
+	github.com/matttproud/golang_protobuf_extensions v1.0.4 // indirect
+	github.com/prometheus/client_model v0.3.0 // indirect
+	github.com/prometheus/common v0.42.0 // indirect
+	github.com/prometheus/procfs v0.9.0 // indirect
+	golang.org/x/sys v0.6.0 // indirect
+	google.golang.org/protobuf v1.30.0 // indirect
 )