Unable to run Sorbet type check on GitHub actions

[tatsuya]

Issue summary

https://github.com/Shopify/shopify_api/runs/7036271248?check_suite_focus=true

sorbet/rbi/todo.rbi is outdated causing the GitHub build workflow failure like below:

Run bundle exec srb tc
sorbet/rbi/todo.rbi:7: `RDoc::Task` was previously defined as a `class` https://srb.help/[4](https://github.com/Shopify/shopify_api/runs/7036271248?check_suite_focus=true#step:7:5)012
     7 |module RDoc::Task; end
        ^^^^^^^^^^^^^^^^^
    https://github.com/sorbet/sorbet/tree/0b0b87fe[5](https://github.com/Shopify/shopify_api/runs/7036271248?check_suite_focus=true#step:7:6)34cd33bc[6](https://github.com/Shopify/shopify_api/runs/7036271248?check_suite_focus=true#step:7:7)0e9b5c65[7](https://github.com/Shopify/shopify_api/runs/7036271248?check_suite_focus=true#step:7:8)4565973593d1e/rbi/stdlib/rdoc.rbi#L9339: Previous definit
    9339 |class RDoc::Task
          ^^^^^^^^^^^^^^^^
Errors: 1
Error: Process completed with exit code 1.

Expected behavior

GitHub flow passes successfully.

Actual behavior

GitHub flow fails.

Steps to reproduce the problem

Open a pull request (example)

Specifications

• shopify_api version: N/A
• Shopify API version used (example: 2020-07): N/A