docs: Add docs for that write_delay_ms affects graphql calls (#2386)

Co-authored-by: felix-luthman_flexera <[email protected]>

website/docs/index.html.markdown

@@ -116,7 +116,7 @@ The following arguments are supported in the `provider` block:
   * `installation_id` - (Required) This is the ID of the GitHub App installation. It can sourced from the `GITHUB_APP_INSTALLATION_ID` environment variable.
   * `pem_file` - (Required) This is the contents of the GitHub App private key PEM file. It can also be sourced from the `GITHUB_APP_PEM_FILE` environment variable and may use `\n` instead of actual new lines.
 
-* `write_delay_ms` - (Optional) The number of milliseconds to sleep in between write operations in order to satisfy the GitHub API rate limits. Defaults to 1000ms or 1 second if not provided.
+* `write_delay_ms` - (Optional) The number of milliseconds to sleep in between write operations in order to satisfy the GitHub API rate limits. Note that requests to the GraphQL API are implemented as ``POST`` requests under the hood, so this setting affects those calls as well. Defaults to 1000ms or 1 second if not provided.
 
 * `retry_delay_ms` - (Optional) Amount of time in milliseconds to sleep in between requests to GitHub API after an error response. Defaults to 1000ms or 1 second if not provided, the max_retries must be set to greater than zero.