Fix URL shortener docs

Author: milosmns

shrtn/Chart.yaml

@@ -1,5 +1,5 @@
 apiVersion: v2
 name: shrtn
 description: Self-hosted URL shortener (shrtn.io)
-version: 0.1.4
+version: 0.1.5
 type: application

shrtn/README.md

@@ -119,7 +119,7 @@ helm upgrade shrtn appifyhub/shrtn \
 --set ingress.domain.prefix="shrtn" \
 --set config.values.ORIGIN="https://shrtn.realdomain.com" \
 --set ingress.tls.enabled=true \
---set-string ingress.annotations."traefik\.ingress\.kubernetes.io/router\.entrypoints"=websecure \
+--set-string ingress.annotations."traefik\.ingress\.kubernetes\.io/router\.entrypoints"=websecure \
 --set-string ingress.annotations."traefik\.ingress\.kubernetes\.io/router\.tls"=true \
 --set-string ingress.annotations."traefik\.ingress\.kubernetes\.io/router\.tls\.certresolver"=letsencrypt
 ```