Bump containrrr/shoutrrr from 0.4.4 to 0.5.0

Bumps containrrr/shoutrrr from 0.4.4 to 0.5.0.

---
updated-dependencies:
- dependency-name: containrrr/shoutrrr
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

Signed-off-by: dependabot[bot] <support@github.com>

Dockerfile

@@ -1,4 +1,4 @@
-FROM containrrr/shoutrrr:0.4.4
+FROM containrrr/shoutrrr:0.5.0
 
 # @todo can be removed if https://github.com/containrrr/shoutrrr/pull/169 is merged.
 ENTRYPOINT ["/shoutrrr"]