[stable/redis-ha] Fix additionalAffinities indentation (#16256)

When using this value, the identation was incorrectly set, leading to a helm error.

```
==> Linting redis-ha
[ERROR] templates/redis-ha-statefulset.yaml: unable to parse YAML
        error converting YAML to JSON: yaml: line 29: did not find expected key
```

Signed-off-by: Hendrik Purmann <h.purmann@googlemail.com>

stable/redis-ha/Chart.yaml

@@ -6,7 +6,7 @@ keywords:
 - redis
 - keyvalue
 - database
-version: 3.7.2
+version: 3.7.3
 appVersion: 5.0.5
 description: Highly available Kubernetes implementation of Redis
 icon: https://upload.wikimedia.org/wikipedia/en/thumb/6/6b/Redis_Logo.svg/1200px-Redis_Logo.svg.png

stable/redis-ha/templates/redis-ha-statefulset.yaml

@@ -51,7 +51,7 @@ spec:
     {{- end }}
     {{- else }}
     {{- if .Values.additionalAffinities }}
-    {{ toYaml .Values.additionalAffinities | indent 8 }}
+{{ toYaml .Values.additionalAffinities | indent 8 }}
     {{- end }}
         podAntiAffinity:
     {{- if .Values.hardAntiAffinity }}