Add Anthropic subprocessor to TOC to resolve merge conflict

Adds the missing TOC entry so PR #313607 can merge cleanly.

Co-authored-by: Copilot <[email protected]>

Author: craigshoemaker

articles/sre-agent/toc.yml

@@ -210,6 +210,8 @@ items:
         href: data-privacy.md
       - name: Pricing and billing
         href: pricing-billing.md
+      - name: Anthropic subprocessor
+        href: anthropic-sub-processor.md
       - name: Billing
         href: billing.md
       - name: Frequently asked questions