ci: bump conformance to 0.1.13

Author: pcarleton

.github/workflows/conformance.yml

@@ -42,4 +42,4 @@ jobs:
         with:
           node-version: 24
       - run: uv sync --frozen --all-extras --package mcp
-      - run: npx @modelcontextprotocol/conformance@0.1.10 client --command 'uv run --frozen python .github/actions/conformance/client.py' --suite all
+      - run: npx @modelcontextprotocol/conformance@0.1.13 client --command 'uv run --frozen python .github/actions/conformance/client.py' --suite all