docs: Add --incompatible_disallow_empty_glob to correctness.bazelrc

[thirtyseven]

This is a good flag to enable by default because it prevents a common mistake and usually is what users expect.

---

Type of change

• Documentation (updates to documentation or READMEs)

For changes visible to end-users

• Breaking change (this change will force users to change their own code or config)
  • When updating their bazelrc to include this, some users may need to fix broken BUILD files or specify allow_empty=True when they were intentionally relying on the previous behavior.

Test plan

Not sure this applies here.

[CLAassistant]

All committers have signed the CLA.

[gregmagolan]

Thanks for the suggestion @thirtyseven. I think this is a good one to add. @alexeagle wdyt?