chore(deps): update ghcr.io/stacklok/dockyard/npx/phoenix-mcp docker tag to v2.2.19 (#314)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

registry/phoenix/spec.yaml

@@ -1,5 +1,5 @@
 # Docker/OCI image reference (REQUIRED)
-image: ghcr.io/stacklok/dockyard/npx/phoenix-mcp:2.2.18
+image: ghcr.io/stacklok/dockyard/npx/phoenix-mcp:2.2.19
 # One-line description (REQUIRED)
 description: MCP server for Arize Phoenix observability platform
 # Communication protocol (REQUIRED)