text: Title: Getting disabled Socket Mode tests back in CI builds
  Body: As a few Socket Mode related tests started failing only in the GitHub Actions environment, I've disabled them by this commit: https://github.com/slackapi/python-slack-sdk/commit/75b554a5e9c746641aa1805fce0584e0577f378b
  
  We would like to get the tests back to the running tests in CI builds once we figure out the way to make them stable.
  
  ### Category (place an `x` in each of the `[ ]`)
  
  - [ ] **slack_sdk.web.WebClient (sync/async)** (Web API client)
  - [ ] **slack_sdk.webhook.WebhookClient (sync/async)** (Incoming Webhook, response_url sender)
  - [ ] **slack_sdk.models** (UI component builders)
  - [ ] **slack_sdk.oauth** (OAuth Flow Utilities)
  - [ ] **slack_sdk.socket_mode** (Socket Mode client)
  - [ ] **slack_sdk.audit_logs** (Audit Logs API client)
  - [ ] **slack_sdk.scim** (SCIM API client)
  - [ ] **slack_sdk.rtm** (RTM client)
  - [ ] **slack_sdk.signature** (Request Signature Verifier)
  
  ### Requirements
  
  Please read the [Contributing guidelines](https://github.com/slackapi/python-slack-sdk/blob/main/.github/contributing.md) and [Code of Conduct](https://slackhq.github.io/code-of-conduct) before creating this issue or pull request. By submitting, you are agreeing to those rules.
  