chore(tt-rss): update image ghcr.io/tt-rss/tt-rss-web-nginx digest to cfd187c (#49148)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| ghcr.io/tt-rss/tt-rss-web-nginx | digest | `7b0efde` → `cfd187c` |

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> [!WARNING]
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charts/stable/tt-rss/Chart.yaml

@@ -37,5 +37,5 @@ sources:
   - https://git.tt-rss.org/fox/tt-rss
   - https://github.com/trueforge-org/truecharts/tree/master/charts/stable/tt-rss
 type: application
-version: 21.4.6
+version: 21.4.7
 

charts/stable/tt-rss/values.yaml

@@ -6,7 +6,7 @@ image:
 nginxImage:
   repository: ghcr.io/tt-rss/tt-rss-web-nginx
   pullPolicy: IfNotPresent
-  tag: latest@sha256:7b0efde15b5dae5cc0a000aa3bc9048496867750fe5ce22b0546c39888192006
+  tag: latest@sha256:cfd187cc8009646be2f135c1b1dba5c77118ff21fc62c750f3c302d228e416f9
 updaterImage:
   repository: ghcr.io/tt-rss/tt-rss
   pullPolicy: IfNotPresent