ci(.github): fix extra endline in repo-health README script (#5861)

Signed-off-by: Charly Molter <charly.molter@konghq.com>

README.md

@@ -142,4 +142,3 @@ If you are implementing Kuma in a mission-critical environment and require enter
 [kuma-gui]: https://kuma-public-assets.s3.amazonaws.com/kuma-gui-v3.jpg
 [kuma-benefits]: https://kuma-public-assets.s3.amazonaws.com/kuma-benefits-v2.png
 
-

mk/dev.mk

@@ -89,7 +89,7 @@ dev/sync-demo:
 		sed 's/\([^/]\)kuma-demo/\1{{ .Namespace }}/g' \
 		> app/kumactl/data/install/k8s/demo/gateway.yaml
 
-CIRCLECI_BADGE ?= "[![CircleCI {{branch}}](https://img.shields.io/circleci/build/github/kumahq/kuma/{{branch}}?label={{branch}})](https://circleci.com/gh/kumahq/kuma/tree/{{branch}})"
+CIRCLECI_BADGE ?= [![CircleCI {{branch}}](https://img.shields.io/circleci/build/github/kumahq/kuma/{{branch}}?label={{branch}})](https://circleci.com/gh/kumahq/kuma/tree/{{branch}})
 .PHONY: dev/repo-health
 dev/repo-health:
-	go run $(TOOLS_DIR)/dev/repo-health.go -action README -circleci-badge $(CIRCLECI_BADGE)
+	go run $(TOOLS_DIR)/dev/repo-health.go -action README -circleci-badge '$(CIRCLECI_BADGE)'

tools/dev/repo-health.go

@@ -65,7 +65,6 @@ func replaceInFile(fileName string, marker string, content string) error {
 	}
 	endMarkerIdx += startMarkerIdx + 1
 	out.WriteString(strings.Join(lines[endMarkerIdx:], "\n"))
-	out.WriteString("\n")
 
 	return os.WriteFile(fileName, out.Bytes(), os.ModePerm)
 }