chore: fix package.json reference to atom directory (#25682)

package.json

@@ -71,7 +71,7 @@
     "generate-version-json": "node script/generate-version-json.js",
     "lint": "node ./script/lint.js && npm run lint:clang-format && npm run lint:docs",
     "lint:js": "node ./script/lint.js --js",
-    "lint:clang-format": "python script/run-clang-format.py -r -c atom/ chromium_src/ || (echo \"\\nCode not formatted correctly.\" && exit 1)",
+    "lint:clang-format": "python script/run-clang-format.py -r -c chromium_src/ shell/ || (echo \"\\nCode not formatted correctly.\" && exit 1)",
     "lint:cpp": "node ./script/lint.js --cc",
     "lint:objc": "node ./script/lint.js --objc",
     "lint:py": "node ./script/lint.js --py",