fix(build): resolve CI failures for release 0.5.0 PR (#174)

## Description

Resolved two CI failures blocking the release-please 0.5.0 PR (#173):
**Spell Check** and **Markdown Link Check**.

The Spell Check failure was caused by three unrecognized terms in the
new 0.5.0 CHANGELOG section — *MLflow*, *Dependabot*, and *CSRF* — that
were not present in the cspell custom dictionaries. Added each term to
the appropriate dictionary file.

The Markdown Link Check failure was caused by legacy repository URLs in
*CHANGELOG.md* pointing to the archived
`Azure-Samples/azure-nvidia-robotics-reference-architecture` location.
Since all tags and history were migrated to
`microsoft/physical-ai-toolchain`, replaced all 99 legacy URLs with the
current repository path. The updated URLs match the existing link
checker `ignorePattern`, resolving the CI failure.

> These fixes are intentionally minimal and surgical — only the specific
CI blockers were addressed, with no refactoring or restructuring of
existing content.

Related to PR #173

## Type of Change

- [x] 🐛 Bug fix (non-breaking change fixing an issue)
- [ ] ✨ New feature (non-breaking change adding functionality)
- [ ] 💥 Breaking change (fix or feature causing existing functionality
to change)
- [ ] 📚 Documentation update
- [ ] 🏗️ Infrastructure change (Terraform/IaC)
- [ ] ♻️ Refactoring (no functional changes)

## Component(s) Affected

- [ ] `deploy/000-prerequisites` - Azure subscription setup
- [ ] `deploy/001-iac` - Terraform infrastructure
- [ ] `deploy/002-setup` - OSMO control plane / Helm
- [ ] `deploy/004-workflow` - Training workflows
- [ ] `src/training` - Python training scripts
- [ ] `docs/` - Documentation

## Testing Performed

- [ ] Terraform `plan` reviewed (no unexpected changes)
- [ ] Terraform `apply` tested in dev environment
- [ ] Training scripts tested locally with Isaac Sim
- [ ] OSMO workflow submitted successfully
- [ ] Smoke tests passed (`smoke_test_azure.py`)

**Additional validation performed:**

- `npm run spell-check` — 0 issues across 399 files after dictionary
additions
- `npx markdown-link-check CHANGELOG.md` — all replaced URLs confirmed
IGNORED by existing pattern
- Tags v0.1.0–v0.5.0 verified present on
`microsoft/physical-ai-toolchain` with HTTP 200 responses

## Documentation Impact

- [x] No documentation changes needed
- [ ] Documentation updated in this PR
- [ ] Documentation issue filed

## Bug Fix Checklist

*Complete this section for bug fix PRs. Skip for other contribution
types.*

- [x] Linked to issue being fixed
- [ ] Regression test included, OR
- [x] Justification for no regression test: CI checks (Spell Check,
Markdown Link Check) themselves serve as the regression mechanism — the
same CI pipeline that detected these failures will validate the fix on
merge.

## Checklist

- [x] My code follows the [project conventions](copilot-instructions.md)
- [x] Commit messages follow [conventional commit
format](instructions/commit-message.instructions.md)
- [x] I have performed a self-review

Signed-off-by: Bill Berry <wbery@microsoft.com>
Co-authored-by: Bill Berry <wbery@microsoft.com>

Author: WilliamBerryiii

.cspell/azure-services.txt

@@ -40,12 +40,14 @@ azuremonitor
 azureml
 containerapp
 cosmosdb
+Dependabot
 deviceregistry
 eastus
 Entra
 entra
 Eventhouse
 keyvault
+MLflow
 onedrive
 onenote
 powerbi

.cspell/industry-acronyms.txt

@@ -7,6 +7,7 @@ BYOK
 CAIRA
 CCPA
 CLDR
+CSRF
 CMMS
 COMMITMSG
 C-SCRM