Update confmap/provider/googlesecretsprovider/README.md

Co-authored-by: Braydon Kains <[email protected]>

Author: XuechunHou

confmap/provider/googlesecretsprovider/README.md

@@ -13,7 +13,7 @@
 ## Summary
 
 This Provider component offers a secure way to reference secrets or sensitive information in collector configurations using [Google Secret Manager](https://cloud.google.com/security/products/secret-manager). Use a placeholder in the format `${googlesecretsprovider:projects/<project Id>/secrets/<secret Id>/versions/<version Id>}` within your configuration. The actual secrets will then be fetched dynamically from [Google Secret Manager](https://cloud.google.com/security/products/secret-manager) during collector initialization.
-## How it works
+## Usage
 
 - Simply replace plaintext secrets within the Otel configurations with the placeholder: `${googlesecretsprovider:projects/<project Id>/secrets/<secret Id>/versions/<version Id>}`