ci(ipa): Add IPA-117-description override for Principal.onBehalfOf (#1381)

Co-authored-by: mongodb-sage-bot[bot] <247496174+mongodb-sage-bot[bot]@users.noreply.github.com>

Author: mongodb-sage-bot[bot]

tools/spectral/ipa/ipa-spectral.yaml

@@ -33,6 +33,7 @@ overrides:
   - files:
       - '**#/components/schemas/ClusterProviderSettings/properties/providerName' # dynamic field which can't be documented
       - '**#/components/schemas/DataLakeStoreSettings/properties/provider'
+      - '**#/components/schemas/Principal/properties/onBehalfOf'
     rules:
       xgen-IPA-117-description: 'off'
   - files: