build(deps): bump openai

Bumps the production group in /services/discord-gateway with 1 update: [openai](https://github.com/openai/openai-node).


Updates `openai` from 7.15.0 to 7.18.0
- [Release notes](https://github.com/openai/openai-node/releases)
- [Changelog](https://github.com/openai/openai-node/blob/main/CHANGELOG.md)
- [Commits](https://github.com/openai/openai-node/compare/v7.15.0...v7.18.0)

---
updated-dependencies:
- dependency-name: openai
  dependency-version: 7.18.0
  dependency-type: direct:production
  update-type: version-update:semver-minor
  dependency-group: production
...

Signed-off-by: dependabot[bot] <support@github.com>

services/discord-gateway/package.json

@@ -34,7 +34,7 @@
     "ioredis": "^6.0.0",
     "libsodium-wrappers": "^0.8.4",
     "lru-cache": "^11.5.1",
-    "openai": "^7.15.0",
+    "openai": "^7.18.0",
     "opusscript": "^0.1.1",
     "p-limit": "^7.3.2",
     "p-retry": "^8.0.1",

services/discord-gateway/pnpm-lock.yaml

@@ -39,8 +39,8 @@ importers:
         specifier: ^11.5.1
         version: 11.5.2
       openai:
-        specifier: ^7.15.0
-        version: 7.15.0(undici@7.29.0)(ws@8.21.3)(zod@4.6.5)
+        specifier: ^7.18.0
+        version: 7.18.0(undici@7.29.0)(ws@8.21.3)(zod@4.6.5)
       opusscript:
         specifier: ^0.1.1
         version: 0.1.1
@@ -1946,8 +1946,8 @@ packages:
   once@1.4.0:
     resolution: {integrity: sha512-lNaJgI+2Q5URQBkccEKHTQOPaXdUxnZZElQTZY0MFUAuaEqe1E+Nyvgdz/aIyNi6Z9MzO5dv1H8n58/GELp3+w==}
 
-  openai@7.15.0:
-    resolution: {integrity: sha512-2DIwesnPSduw68MFx7nAdgvshrgvS8WOan5W8+tgUMlAy/tY+Q41g80Pa+w/v64rHA6rtn+dketa8QvMVxU96w==}
+  openai@7.18.0:
+    resolution: {integrity: sha512-S+xxaUf9VzIHEPDUpUFnRgvR2Ho0K1yZEaSJ8gd7xQlCNm4sdOD7/QaKWLRTYK3MK6KhwpD3cOEC0F4OPG698A==}
     engines: {node: '>=22.0.0'}
     peerDependencies:
       '@aws-sdk/credential-provider-node': '>=3.972.0 <4'
@@ -3836,7 +3836,7 @@ snapshots:
     dependencies:
       wrappy: 1.0.2
 
-  openai@7.15.0(undici@7.29.0)(ws@8.21.3)(zod@4.6.5):
+  openai@7.18.0(undici@7.29.0)(ws@8.21.3)(zod@4.6.5):
     optionalDependencies:
       undici: 7.29.0
       ws: 8.21.3