Update ajv to version 8.18.0 and adjust related dependencies in package.json and pnpm-lock.yaml (#5668)

* Update ajv to version 8.18.0 and adjust related dependencies in package.json and pnpm-lock.yaml

* Update ajv to version 8.18.0 and adjust related dependencies in package.json and pnpm-lock.yaml

* Rush change.

---------

Co-authored-by: Lucas Akira Uehara <ksakira10@users.noreply.github.com>
Co-authored-by: Ian Clanton-Thuon <iclanton@users.noreply.github.com>

Author: KsAkira10

build-tests/api-extractor-test-05/dist/tsdoc-metadata.json

@@ -5,7 +5,7 @@
   "toolPackages": [
     {
       "packageName": "@microsoft/api-extractor",
-      "packageVersion": "7.57.0"
+      "packageVersion": "7.57.4"
     }
   ]
 }

common/changes/@rushstack/node-core-library/chore-ajv-8.18.0_2026-02-24-20-29.json

@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "Update `ajv` dependency to `~8.18.0` to mitigate CVE-2025-69873.",
+      "type": "patch",
+      "packageName": "@rushstack/node-core-library"
+    }
+  ],
+  "packageName": "@rushstack/node-core-library",
+  "email": "ksakira10@users.noreply.github.com"
+}

common/changes/@rushstack/rig-package/chore-ajv-8.18.0_2026-02-24-20-29.json

@@ -0,0 +1,11 @@
+{
+  "changes": [
+    {
+      "comment": "Update `ajv` dependency to `~8.18.0` to mitigate CVE-2025-69873.",
+      "type": "patch",
+      "packageName": "@rushstack/rig-package"
+    }
+  ],
+  "packageName": "@rushstack/rig-package",
+  "email": "ksakira10@users.noreply.github.com"
+}

common/config/subspaces/build-tests-subspace/pnpm-lock.yaml

@@ -1,6 +1,6 @@
 // DO NOT MODIFY THIS FILE MANUALLY BUT DO COMMIT IT. It is generated and used by Rush.
 {
-  "pnpmShrinkwrapHash": "970749d264e69bf8ff6a9fb6007b379832c9ac09",
+  "pnpmShrinkwrapHash": "c54f6c4e7e95ab9ec7eea9bb83c23d3e16e1cf20",
   "preferredVersionsHash": "550b4cee0bef4e97db6c6aad726df5149d20e7d9",
-  "packageJsonInjectedDependenciesHash": "0124c511e290517bf309935112b2dbab981575bb"
+  "packageJsonInjectedDependenciesHash": "5ee5882b6233cff7ba797a5af227d9aad35192e5"
 }