fix(deps): update typescript-eslint monorepo to v8

Author: renovate[bot]

package.json

@@ -35,8 +35,8 @@
   },
   "dependencies": {
     "@sourcegraph/prettierrc": "^3.0.3",
-    "@typescript-eslint/eslint-plugin": "^6.9.0",
-    "@typescript-eslint/parser": "^6.9.0",
+    "@typescript-eslint/eslint-plugin": "^8.18.0",
+    "@typescript-eslint/parser": "^8.18.0",
     "eslint-config-prettier": "^9.0.0",
     "eslint-plugin-ban": "^1.4.0",
     "eslint-plugin-etc": "^2.0.2",