fix typings:public script for firestore

Author: MarkDuckworth

packages/firestore/package.json

@@ -57,7 +57,7 @@
     "api-report:api-json": "rm -rf temp && api-extractor run --local --verbose",
     "api-report": "run-s --npm-path npm api-report:main api-report:pipelines api-report:lite api-report:lite:pipelines && yarn api-report:api-json",
     "doc": "api-documenter markdown --input temp --output docs",
-    "typings:public": "node ../../scripts/build/use_typings.js ./dist/all-packages.d.ts",
+    "typings:public": "node ../../scripts/build/use_typings.js ./dist/index.d.ts",
     "assertion-id:check": "ts-node scripts/assertion-id-tool.ts --dir=src --check",
     "assertion-id:new": "ts-node scripts/assertion-id-tool.ts --dir=src --new",
     "assertion-id:list": "ts-node scripts/assertion-id-tool.ts --dir=src --list",