Templating - reReplaceAll not defined

[dccarbone]

Hi! I need to replace space in the alertname with %20 but the function "reReplaceAll" is appearing as not defined.
I tested with urlquery and it replace " " with +, but with this I need to replace + with %20.

Do you guys know how can I use the function reReplaceAll? I checked and it was implemented by the alertmanager lib here.

Error:
time="2023-05-26T13:04:08Z" level=fatal msg="error initialising google chat provider" error="template: message.tmpl:28: function \"reReplaceAll\" not defined"

Template:

{{- define "alert_silence_link" -}}
{{- if eq .Status "firing" -}}
{{ template "externalURL" . }}/#/silences/new?filter=%7B
{{- range .Labels.SortedPairs -}}
{{- if ne .Name "alertname" -}}
{{- .Name }}%3D%22{{ urlquery .Value | reReplaceAll "\+" "%20" }}%22%2C%20
{{- end -}}
{{- end -}}
alertname%3D%22{{ urlquery .Labels.alertname | reReplaceAll "\+" "%20" }}%22%7D
{{- end -}}
{{- end -}}