docs: document --use-docker and --no-docker options in cfn submit

[cv-dote]

Issue #, if available: #1119

Description of changes:

Summary

Document the --use-docker and --no-docker options of cfn submit in doc_source/resource-type-cli-submit.md.

These options were added to the CLI in #970 but were never reflected in the documentation. As a result, the public AWS documentation page (generated from doc_source/) does not mention them either.

Changes

• Add [--use-docker] and [--no-docker] to the Synopsis block.
• Add an Options entry for each flag, describing:
  • What the flag does.
  • That --use-docker and --no-docker are mutually exclusive.
  • That these flags override the corresponding setting in the project's .rpdk-config.

No code changes. The wording for the options is adapted from the existing help= strings in src/rpdk/core/submit.py so that cfn submit --help and the documentation stay consistent.

Verification

• Confirmed that --use-docker / --no-docker are implemented in src/rpdk/core/submit.py (added in Add in no-docker and use-docker override to submit command #970).
• Compared the updated doc against cfn submit --help output to make sure the described semantics match the implementation.

By submitting this pull request, I confirm that my contribution is made under the terms of the Apache 2.0 license.