chore: update linting and workflows for xero-webhooks.yaml

Author: rpocklin

.github/workflows/lint.yml

@@ -8,7 +8,7 @@ jobs:
       - name: yaml-lint
         uses: ibiqlik/action-yamllint@v3
         with:
-          file_or_dir: xero_accounting.yaml xero_assets.yaml xero_bankfeeds.yaml xero_files.yaml xero-app-store.yaml xero-identity.yaml xero-payroll-au.yaml xero-payroll-nz.yaml xero-payroll-uk.yaml xero-projects.yaml
+          file_or_dir: xero_accounting.yaml xero_assets.yaml xero_bankfeeds.yaml xero_files.yaml xero-app-store.yaml xero-identity.yaml xero-payroll-au.yaml xero-payroll-nz.yaml xero-payroll-uk.yaml xero-projects.yaml xero-webhooks.yaml
           config_data: |
             extends: default
             rules:

validator/xero-spectral.yaml

@@ -158,3 +158,4 @@ rules:
   operation-tag-defined: off  # Disable operation tags defined in global tags rule
   owasp:api4:2023-string-restricted: off  # Disable string restricted rule to address warnings
   path-params: off  # Disable path parameter validation to address mapping key issues
+  owasp:api8:2023-define-cors-origin: off  # Disable CORS origin header requirement