#277 chore: update submodule dependencies to latest main

Updates submodule dependencies

This PR updates the go.mod files in submodules to reference the latest commit from main.

Updated to: v1.25.7-0.20261016005544-5c1b54d9652a
Updated modules: customrules converter-tests cmd

Changes:

• Updated github.com/speakeasy-api/openapi dependency in submodule go.mod files
• Ran go mod tidy to update dependencies

---

This PR was automatically created by the update-submodule-dependencies workflow

---

Summary by cubic

Updates the github.com/speakeasy-api/openapi dependency in submodule go.mod files to the latest commit on main (v1.25.7-0.20261016005544-5c1b54d9652a). Affects the cmd, customrules, and converter-tests submodules. Also runs go mod tidy to keep dependency trees consistent.