Custom headers annotation feature doesn't allowed headers with multiple value

[fsologureng]

Hello

I want to replace the following configuration-snippet annotation:

annotations:
...
    nginx.ingress.kubernetes.io/configuration-snippet: |
      add_header X-Robots-Tag "noindex";
      add_header X-Robots-Tag "noai";
      add_header X-Robots-Tag "Google-Extended: none";
      add_header X-Robots-Tag "GPTBot: none";
      add_header X-Robots-Tag "ChatGPT-User: none";
      add_header X-Robots-Tag "anthropic-ai: none";
      add_header X-Robots-Tag "CCBot: none";

with an usage of the Custom Headers annotation, but the implementation doesn't support this repeated headers setting, as the source code reveals:

ingress-nginx/internal/ingress/annotations/customheaders/main.go

Lines 34 to 37 in fd4c8ac

	// Config returns the custom response headers for an Ingress rule
	type Config struct {
	Headers map[string]string `json:"headers,omitempty"`
	}

ingress-nginx/rootfs/etc/nginx/template/nginx.tmpl

Lines 334 to 336 in fd4c8ac

	{{ range $k, $v := $addHeaders }}
	more_set_headers {{ printf "%s: %s" $k $v | quote }};
	{{ end }}

Can you declare it in the documentation please?

[k8s-ci-robot]

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