chore(deps): Bump blinklabs-io/mithril-client from 0.11.11-1 to 0.12.1-1 (#252)

Bumps [blinklabs-io/mithril-client](https://github.com/blinklabs-io/docker-mithril-client) from 0.11.11-1 to 0.12.1-1.
- [Release notes](https://github.com/blinklabs-io/docker-mithril-client/releases)
- [Commits](blinklabs-io/docker-mithril-client@v0.11.11-1...v0.12.1-1)

---
updated-dependencies:
- dependency-name: blinklabs-io/mithril-client
  dependency-version: 0.12.1-1
  dependency-type: direct:production
  update-type: version-update:semver-minor
...

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

Author: dependabot[bot]

Dockerfile

@@ -22,7 +22,7 @@ RUN echo "Building tags/${NODE_VERSION}..." \
 
 FROM ghcr.io/blinklabs-io/cardano-cli:10.8.0.0-1 AS cardano-cli
 FROM ghcr.io/blinklabs-io/cardano-configs:20250213-1 AS cardano-configs
-FROM ghcr.io/blinklabs-io/mithril-client:0.11.11-1 AS mithril-client
+FROM ghcr.io/blinklabs-io/mithril-client:0.12.1-1 AS mithril-client
 FROM ghcr.io/blinklabs-io/mithril-signer:0.2.237-1 AS mithril-signer
 FROM ghcr.io/blinklabs-io/nview:0.10.8 AS nview
 FROM ghcr.io/blinklabs-io/txtop:0.12.3 AS txtop