chore(router): bump demo library to pickup subscription fix

[df-wg]

Motivation and Context

In 99designs/gqlgen#3329, I solved an issue for our subscription demos, which had been causing a nil pointer error at the conclusion of a bounded subscription:

❯ curl -i -H "Accept: multipart/mixed" -X POST http://localhost:3002/graphql -d '{"query": "subscription { countFor(count: 2) }"}'
HTTP/1.1 200 OK
Cache-Control: no-cache
Connection: keep-alive
Content-Type: multipart/mixed; boundary=graphql
Vary: Accept-Encoding
X-Accel-Buffering: no
Date: Mon, 20 Jan 2025 07:30:54 GMT
Transfer-Encoding: chunked


--graphql
Content-Type: application/json

{"payload":{"data":{"countFor":0}}}

--graphql
Content-Type: application/json

{"payload":{"data":{"countFor":1}}}

--graphql
Content-Type: application/json

{"payload":{"data":{"countFor":2}}}

--graphql
Content-Type: application/json

{"payload":{"errors":[{"message":"internal system error"}],"data":null}}
--graphql--

Now, it doesn't return the internal system error:

❯ curl -i -H "Accept: multipart/mixed" -X POST http://localhost:3002/graphql -d '{"query": "subscription { countFor(count: 2) }"}'
HTTP/1.1 200 OK
Cache-Control: no-cache
Connection: keep-alive
Content-Type: multipart/mixed; boundary=graphql
Vary: Accept-Encoding
X-Accel-Buffering: no
Date: Mon, 20 Jan 2025 12:55:06 GMT
Transfer-Encoding: chunked


--graphql
Content-Type: application/json

{"payload":{"data":{"countFor":0}}}

--graphql
Content-Type: application/json

{"payload":{"data":{"countFor":1}}}

--graphql
Content-Type: application/json

{"payload":{"data":{"countFor":2}}}
--graphql--

Checklist

• I have discussed my proposed changes in an issue and have received approval to proceed.
• I have followed the coding standards of the project.
• Tests or benchmarks have been added or updated.
• Documentation has been updated on https://github.com/wundergraph/cosmo-docs.
• I have read the Contributors Guide.

[github-actions]

Router image scan passed

✅ No security vulnerabilities found in image:

ghcr.io/wundergraph/cosmo/router:sha-e89ae2379db6cfaeb65ec94a9b9d4ec4eac281b8

[StarpTech]

LGTM