add comments in go.mod to help keeping the doc in sync

go.mod

@@ -149,7 +149,7 @@ require (
 	github.com/prometheus-community/elasticsearch_exporter v1.5.0
 	github.com/prometheus-community/postgres_exporter v0.11.1
 	github.com/prometheus-community/stackdriver_exporter v0.15.1
-	github.com/prometheus-community/windows_exporter v0.27.4-0.20241010144849-a0f6d3bcf9a4
+	github.com/prometheus-community/windows_exporter v0.27.4-0.20241010144849-a0f6d3bcf9a4 // if you update the windows_exporter version, make sure to update the PROM_WIN_EXP_VERSION in _index
 	github.com/prometheus-operator/prometheus-operator v0.66.0
 	github.com/prometheus-operator/prometheus-operator/pkg/apis/monitoring v0.66.0
 	github.com/prometheus-operator/prometheus-operator/pkg/client v0.66.0
@@ -164,7 +164,7 @@ require (
 	github.com/prometheus/node_exporter v1.6.0
 	github.com/prometheus/procfs v0.15.1
 	github.com/prometheus/prometheus v0.54.1 // a.k.a. v2.51.2
-	github.com/prometheus/snmp_exporter v0.26.0 // if you update the snmp_exporter version, make sure to update the links in prometheus.exporter.snmp
+	github.com/prometheus/snmp_exporter v0.26.0 // if you update the snmp_exporter version, make sure to update the SNMP_VERSION in _index
 	github.com/prometheus/statsd_exporter v0.22.8
 	github.com/richardartoul/molecule v1.0.1-0.20221107223329-32cfee06a052
 	github.com/rogpeppe/go-internal v1.12.0