chore: remove ARM architecture support from release checksums (kubernetes#22585)

* chore: remove ARM architecture support from release checksums and Linux map.

* style: add blank lines to CHANGELOG.md

Author: medyagh

CHANGELOG.md

@@ -106,6 +106,7 @@
 * inspektor-gadget addon: remove deleted asset (#21855)
 
 ## Base image versions
+
 * iso: bump to containerd/nerdctl 2.x (#21409)
 * ISO: Update docker-buildx from v0.17.1 to v0.30.1 (#22425)
 * iso: Use same Go version (1.25.5) (#22101)
@@ -127,6 +128,7 @@
 ## Infra Migration
 
 minikube infra structure is under heavy migration to k8s-infra here are some related PRs:
+
 * preload: download from github when gcs not available (#21605)
 * prow add docker-docker-linux-x86-64 integration test in prow (#21807)
 * prow: migrate  kubernetes bootcamp image to prow (#21904)

hack/jenkins/release_update_releases_json.go

@@ -122,7 +122,7 @@ func createBareRelease(name string) release {
 	return release{
 		Checksums: checksums{
 			AMD64:   &operatingSystems{},
-			ARM:     &operatingSystems{},
+
 			ARM64:   &operatingSystems{},
 			PPC64LE: &operatingSystems{},
 			S390X:   &operatingSystems{},
@@ -139,7 +139,7 @@ func getSHAMap(c *checksums) map[string]map[string][]*string {
 		},
 		"linux": {
 			"amd64":   {&c.AMD64.Linux, &c.Linux},
-			"arm":     {&c.ARM.Linux},
+
 			"arm64":   {&c.ARM64.Linux},
 			"ppc64le": {&c.PPC64LE.Linux},
 			"s390x":   {&c.S390X.Linux},