Update module github.com/prometheus/client_golang to v1.20.4 (#853)

| datasource | package                             | from    | to      |
| ---------- | ----------------------------------- | ------- | ------- |
| go         | github.com/prometheus/client_golang | v1.20.3 | v1.20.4 |

Signed-off-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>
Co-authored-by: Jakub Jarosz <[email protected]>

Author: renovate[bot]

go.mod

@@ -5,7 +5,7 @@ go 1.22.6
 require (
 	github.com/alecthomas/kingpin/v2 v2.4.0
 	github.com/nginxinc/nginx-plus-go-client v1.3.0
-	github.com/prometheus/client_golang v1.20.3
+	github.com/prometheus/client_golang v1.20.4
 	github.com/prometheus/common v0.59.1
 	github.com/prometheus/exporter-toolkit v0.13.0
 )

go.sum

@@ -36,8 +36,8 @@ github.com/nginxinc/nginx-plus-go-client v1.3.0 h1:q/aeT4B5k0KLwWlefoBzfLfraBBvI
 github.com/nginxinc/nginx-plus-go-client v1.3.0/go.mod h1:n8OFLzrJulJ2fur28Cwa1Qp5DZNS2VicLV+Adt30LQ4=
 github.com/pmezard/go-difflib v1.0.0 h1:4DBwDE0NGyQoBHbLQYPwSUPoCMWR5BEzIk/f1lZbAQM=
 github.com/pmezard/go-difflib v1.0.0/go.mod h1:iKH77koFhYxTK1pcRnkKkqfTogsbg7gZNVY4sRDYZ/4=
-github.com/prometheus/client_golang v1.20.3 h1:oPksm4K8B+Vt35tUhw6GbSNSgVlVSBH0qELP/7u83l4=
-github.com/prometheus/client_golang v1.20.3/go.mod h1:PIEt8X02hGcP8JWbeHyeZ53Y/jReSnHgO035n//V5WE=
+github.com/prometheus/client_golang v1.20.4 h1:Tgh3Yr67PaOv/uTqloMsCEdeuFTatm5zIq5+qNN23vI=
+github.com/prometheus/client_golang v1.20.4/go.mod h1:PIEt8X02hGcP8JWbeHyeZ53Y/jReSnHgO035n//V5WE=
 github.com/prometheus/client_model v0.6.1 h1:ZKSh/rekM+n3CeS952MLRAdFwIKqeY8b62p8ais2e9E=
 github.com/prometheus/client_model v0.6.1/go.mod h1:OrxVMOVHjw3lKMa8+x6HeMGkHMQyHDk9E3jmP2AmGiY=
 github.com/prometheus/common v0.59.1 h1:LXb1quJHWm1P6wq/U824uxYi4Sg0oGvNeUm1z5dJoX0=