chore(helm): update image docker.io/testdasi/simple-dns-doh digest to 505f3d0 (#32710)

This PR contains the following updates:

| Package | Update | Change |
|---|---|---|
| docker.io/testdasi/simple-dns-doh | digest | `d3e7394` -> `505f3d0` |

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

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charts/stable/dns-doh-companion/Chart.yaml

@@ -33,4 +33,4 @@ sources:
   - https://github.com/truecharts/charts/tree/master/charts/stable/dns-doh-companion
   - https://hub.docker.com/r/testdasi/simple-dns-doh
 type: application
-version: 7.5.5
+version: 7.5.6

charts/stable/dns-doh-companion/values.yaml

@@ -1,7 +1,7 @@
 image:
   pullPolicy: IfNotPresent
   repository: docker.io/testdasi/simple-dns-doh
-  tag: latest@sha256:d3e73943e9e79087b78619960a03fe3730927b14ce5fc6db78f1222096dcedf4
+  tag: latest@sha256:505f3d04c7154247d7932fc7cfb1c4bbcc68e19fa80876ffafcc4d52c6a395d2
 persistence: {}
 portal:
   open: