docs: update pnpm workspace example in docs to avoid edge cases (#2111)

Author: sbussard

docs/README.md

@@ -109,21 +109,15 @@ $ bazel fetch @npm//...
 
 ### Using pnpm workspaces
 
-Here's an example `pnpm-workspace.yaml` file which will automatically discover all packages in the repository, based on the existence of a `package.json` file.
+Here's an example `pnpm-workspace.yaml` file which will find all projects under `apps` or `packages` at any depth, and anything directly under `tools`, based on the existence of a `package.json` file.
+
 Make sure to place this file at the root of the repository.
 
 ```yaml
 packages:
-  # Include all directories in the workspace
-  - '*'
-  # Include all subdirectories at any depth
-  - '**/*'
-  # Exclude node_modules folders anywhere in the tree
-  - '!**/node_modules/**'
-  # Exclude node_modules folder in root
-  - '!node_modules'
-  # Exclude anything inside bazel dirs
-  - '!bazel-*/**'
+  - 'apps/**'
+  - 'packages/**'
+  - 'tools/*'
 ```
 
 ### Link the node_modules