chore(deps): fix vulnerable dev dependencies (#8449)

## Summary
Patch both `js-yaml` release lines in `libs/cli/js-examples` for
GHSA-2883-xcg3-v3hh: Jest's transitive copy to 3.15.2 and ESLint's to
4.3.2. Updates the existing fix rather than opening a duplicate; no
runtime dependencies added and no major-version overrides.

Addresses Dependabot alerts
[#398](https://github.com/langchain-ai/langgraph/security/dependabot/398)
and
[#397](https://github.com/langchain-ai/langgraph/security/dependabot/397).
These are real vulnerable versions in example development tooling; patch
rather than dismiss. Alerts remain open until this reaches `main` and
GitHub rescans.

## Verification
- [x] Yarn 1.22.22 regenerated the lockfile with lifecycle scripts
disabled; diff limited to the two js-yaml entries and scoped
resolutions.
- [x] `yarn install --frozen-lockfile --ignore-scripts --force
--non-interactive` in `libs/cli/js-examples`.
- [x] `yarn why js-yaml`: ESLint 4.3.2 and Jest/Istanbul 3.15.2.
- [x] Resolved versions checked against freshly retrieved GitHub
advisory patched versions for both alerts.
- [x] `yarn format:check` and `git diff --check`.
- [ ] Build fails in unchanged `tests/graph.int.test.ts:7`: `input` is
not a valid update property (also recorded in the earlier PR
verification).
- [ ] Unit-test script fails because it uses Jest's removed
`--testPathPattern` option; Jest requires `--testPathPatterns`.
- [ ] Lint fails because ESLint 10 requires `eslint.config.*`, which
this example lacks.

The build/test/lint configuration issues are outside this scoped
dependency patch and remain unresolved. No full test-pass claim.

---------

Co-authored-by: langsmith-fleet[bot] <langsmith-fleet[bot]@users.noreply.github.com>

libs/cli/js-examples/package.json

@@ -25,7 +25,9 @@
     "@langchain/langgraph": "^1.4.13"
   },
   "resolutions": {
-    "@langchain/langgraph-checkpoint": "1.0.4"
+    "@langchain/langgraph-checkpoint": "1.0.4",
+    "jest/**/js-yaml": "3.15.2",
+    "@eslint/eslintrc/js-yaml": "4.3.2"
   },
   "devDependencies": {
     "@eslint/eslintrc": "^3.3.6",

libs/cli/js-examples/yarn.lock

@@ -3744,18 +3744,18 @@ js-tokens@^4.0.0:
   resolved "https://registry.yarnpkg.com/js-tokens/-/js-tokens-4.0.0.tgz#19203fb59991df98e3a287050d4647cdeaf32499"
   integrity sha512-RdJUflcE3cUzKiMqQgsCu06FPu9UdIJO0beYbPhHN4k6apgJtifcoCtT9bcxOpYBtpD2kCM6Sbzg4CausW/PKQ==
 
-js-yaml@^3.13.1:
-  version "3.14.2"
-  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.14.2.tgz#77485ce1dd7f33c061fd1b16ecea23b55fcb04b0"
-  integrity sha512-PMSmkqxr106Xa156c2M265Z+FTrPl+oxd/rgOQy2tijQeK5TxQ43psO1ZCwhVOSdnn+RzkzlRz/eY4BgJBYVpg==
+js-yaml@3.15.2, js-yaml@^3.13.1:
+  version "3.15.2"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-3.15.2.tgz#3f83823ac6be17f570f23b2ecdef3777ff5ea364"
+  integrity sha512-6EuL879VkRA+1Cz578mKMiKvjPNEuk6+r1JaFzoSWejZmtf7xWbIyw1e3KkxlkzTIt9Taw6JBhEppG7utc1P+w==
   dependencies:
     argparse "^1.0.7"
     esprima "^4.0.0"
 
-js-yaml@^4.3.0:
-  version "4.3.1"
-  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-4.3.1.tgz#01216c001d67f48e2cd560d708c7af21090a3848"
-  integrity sha512-CY6crGq313MX8GkwvB7tzgp99vjQxY1++5y10/BKN/GUfHqWaOGQMNZkBvqSzsZKWk/ijwHlWzzkLulsGHhjWQ==
+js-yaml@4.3.2, js-yaml@^4.3.0:
+  version "4.3.2"
+  resolved "https://registry.yarnpkg.com/js-yaml/-/js-yaml-4.3.2.tgz#8e44fb14a2643c59726bb15787b5f1512cb3d3fb"
+  integrity sha512-SFNOvSJ+Dgf/9An904Yx+CgSlIPCkIpao4qo51lpee25TIRejdH3rhR4EZMGoNx3/TP3O+wzWuiTFl4sqbltzA==
   dependencies:
     argparse "^2.0.1"