chore: bump radiorabe/ubi8-minimal from 1.0.3 to 1.0.4 in /wiki (#132)

Bumps radiorabe/ubi8-minimal from 1.0.3 to 1.0.4.

---
updated-dependencies:
- dependency-name: radiorabe/ubi8-minimal
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

wiki/Dockerfile

@@ -72,7 +72,7 @@ RUN rm -rf \
       /var/www/html/extensions/*/.git \
       /var/www/html/skins/*/.git
 
-FROM ghcr.io/radiorabe/ubi8-minimal:1.0.3
+FROM ghcr.io/radiorabe/ubi8-minimal:1.0.4
 
 LABEL vendor='Radio Bern RaBe' \
       maintainer='RaBe IT-Reaktion <it@rabe.ch>'