chore(helm): update image docker.io/cthulhoo/ttrss-web-nginx digest to 5d402cb (#33612)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| docker.io/cthulhoo/ttrss-web-nginx | digest | `3c085e2` -> `5d402cb` |

Add the preset `:preserveSemverRanges` to your config if you don't want
to pin your dependencies.

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charts/stable/tt-rss/Chart.yaml

@@ -34,4 +34,4 @@ sources:
   - https://hub.docker.com/r/cthulhoo/ttrss-fpm-pgsql-static
   - https://hub.docker.com/r/cthulhoo/ttrss-web-nginx
 type: application
-version: 18.5.27
+version: 18.5.28

charts/stable/tt-rss/values.yaml

@@ -5,7 +5,7 @@ image:
 nginxImage:
   repository: docker.io/cthulhoo/ttrss-web-nginx
   pullPolicy: IfNotPresent
-  tag: latest@sha256:3c085e29292564fd89ab1538c4463c8e0d97d92d8bf2304edab5914cc6389c1f
+  tag: latest@sha256:5d402cb2f972be370dd67ad26a40bfa1eca7b5d97728fc87c107027fa007853f
 updaterImage:
   repository: docker.io/cthulhoo/ttrss-fpm-pgsql-static
   pullPolicy: IfNotPresent