minor tweak to download dashboard pdf example
minor tweak to download dashboard pdf example

looker-open-source/sdk-examples,looker/sdk-examples,looker-open-source/sdk-examples,looker-open-source/sdk-examples,looker/sdk-examples,looker/sdk-examples,looker/sdk-examples,looker-open-source/sdk-examples,looker/sdk-examples,looker/sdk-examples,looker-open-source/sdk-examples,looker-open-source/sdk-examples