chore(deps): update ghcr.io/stackloklabs/toolhive-doc-mcp docker tag to v0.0.8 (#464)

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

Author: renovate[bot]

registry/toolhive-doc-mcp/spec.yaml

@@ -7,7 +7,7 @@ tools:
   - query_docs
   - get_chunk
 repository_url: https://github.com/StacklokLabs/toolhive-doc-mcp
-image: ghcr.io/stackloklabs/toolhive-doc-mcp:0.0.7
+image: ghcr.io/stackloklabs/toolhive-doc-mcp:0.0.8
 target_port: 8080
 tags:
   - docs