mod: bump github.com/prometheus/client_golang from 1.20.3 to 1.20.4

Bumps [github.com/prometheus/client_golang](https://github.com/prometheus/client_golang) from 1.20.3 to 1.20.4.
- [Release notes](https://github.com/prometheus/client_golang/releases)
- [Changelog](https://github.com/prometheus/client_golang/blob/main/CHANGELOG.md)
- [Commits](https://github.com/prometheus/client_golang/compare/v1.20.3...v1.20.4)

---
updated-dependencies:
- dependency-name: github.com/prometheus/client_golang
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

4 files changed, 10 insertions, 8 deletions

diff --git a/go.mod b/go.mod
index da151dd40..1906464e2 100644
--- a/go.mod
+++ b/go.mod
@@ -21,7 +21,7 @@ require (
 	github.com/google/uuid v1.6.0
 	github.com/gorilla/handlers v1.5.2
 	github.com/ianlancetaylor/demangle v0.0.0-20240312041847-bd984b5ce465
-	github.com/prometheus/client_golang v1.20.3
+	github.com/prometheus/client_golang v1.20.4
 	github.com/sergi/go-diff v1.3.1
 	github.com/stretchr/testify v1.9.0
 	github.com/ulikunitz/xz v0.5.12
diff --git a/go.sum b/go.sum
index 3477f4064..ecc473c46 100644
--- a/go.sum
+++ b/go.sum
@@ -1193,8 +1193,8 @@ github.com/polyfloyd/go-errorlint v1.6.0 h1:tftWV9DE7txiFzPpztTAwyoRLKNj9gpVm2cg
 github.com/polyfloyd/go-errorlint v1.6.0/go.mod h1:HR7u8wuP1kb1NeN1zqTd1ZMlqUKPPHF+Id4vIPvDqVw=
 github.com/prashantv/gostub v1.1.0 h1:BTyx3RfQjRHnUWaGF9oQos79AlQ5k8WNktv7VGvVH4g=
 github.com/prashantv/gostub v1.1.0/go.mod h1:A5zLQHz7ieHGG7is6LLXLz7I8+3LZzsrV0P1IAHhP5U=
-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 v0.0.0-20190812154241-14fe0d1b01d4/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/prometheus/client_model v0.2.0/go.mod h1:xMI15A0UPsDsEKsMN9yxemIoYk6Tm2C1GtYGdfGttqA=
 github.com/prometheus/client_model v0.3.0/go.mod h1:LDGWKZIo7rky3hgvBe+caln+Dr3dPggB5dvjtD7w9+w=
diff --git a/vendor/github.com/prometheus/client_golang/prometheus/histogram.go b/vendor/github.com/prometheus/client_golang/prometheus/histogram.go
index 8a4f49a4c..519db348a 100644
--- a/vendor/github.com/prometheus/client_golang/prometheus/histogram.go
+++ b/vendor/github.com/prometheus/client_golang/prometheus/histogram.go
@@ -844,9 +844,7 @@ func (h *histogram) Write(out *dto.Metric) error {
 			}}
 		}
 
-		// If exemplars are not configured, the cap will be 0.
-		// So append is not needed in this case.
-		if cap(h.nativeExemplars.exemplars) > 0 {
+		if h.nativeExemplars.isEnabled() {
 			h.nativeExemplars.Lock()
 			his.Exemplars = append(his.Exemplars, h.nativeExemplars.exemplars...)
 			h.nativeExemplars.Unlock()
@@ -1665,6 +1663,10 @@ type nativeExemplars struct {
 	exemplars []*dto.Exemplar
 }
 
+func (n *nativeExemplars) isEnabled() bool {
+	return n.ttl != -1
+}
+
 func makeNativeExemplars(ttl time.Duration, maxCount int) nativeExemplars {
 	if ttl == 0 {
 		ttl = 5 * time.Minute
@@ -1686,7 +1688,7 @@ func makeNativeExemplars(ttl time.Duration, maxCount int) nativeExemplars {
 }
 
 func (n *nativeExemplars) addExemplar(e *dto.Exemplar) {
-	if n.ttl == -1 {
+	if !n.isEnabled() {
 		return
 	}
 
diff --git a/vendor/modules.txt b/vendor/modules.txt
index c96906dfc..e712ab7c8 100644
--- a/vendor/modules.txt
+++ b/vendor/modules.txt
@@ -879,7 +879,7 @@ github.com/pmezard/go-difflib/difflib
 # github.com/polyfloyd/go-errorlint v1.6.0
 ## explicit; go 1.20
 github.com/polyfloyd/go-errorlint/errorlint
-# github.com/prometheus/client_golang v1.20.3
+# github.com/prometheus/client_golang v1.20.4
 ## explicit; go 1.20
 github.com/prometheus/client_golang/internal/github.com/golang/gddo/httputil
 github.com/prometheus/client_golang/internal/github.com/golang/gddo/httputil/header