Prevent reoccurring namespace inconsistencies (#737)

https://gitea.com/gitea/helm-chart/pulls/713 ensured that all resources
contain a `namespace` field. When adding Gitea actions runner support in
https://gitea.com/gitea/helm-chart/pulls/666, this was an oversight.

Signed-off-by: justusbunsi <sk.bunsenbrenner@gmail.com>

Reviewed-on: https://gitea.com/gitea/helm-chart/pulls/737
Co-authored-by: justusbunsi <sk.bunsenbrenner@gmail.com>
Co-committed-by: justusbunsi <sk.bunsenbrenner@gmail.com>

templates/gitea/act_runner/statefulset.yaml

@@ -14,6 +14,7 @@ metadata:
     {{- toYaml . | nindent 4 }}
     {{- end }}
   name: {{ include "gitea.fullname" . }}-act-runner
+  namespace: {{ .Values.namespace | default .Release.Namespace }}
 spec:
   selector:
     matchLabels: