Register fabric-cosmos-spark-auth_4-0_2-13 README in .docsettings.yml

Add the new module's README to known_content_issues to prevent
CI doc validation failures, matching the existing
fabric-cosmos-spark-auth_3 entry.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: xinlian12

eng/.docsettings.yml

@@ -83,6 +83,7 @@ known_content_issues:
   - ['sdk/cosmos/azure-cosmos-spark_4-1_2-13/README.md', '#3113']
   - ['sdk/cosmos/azure-cosmos-spark-account-data-resolver-sample/README.md', '#3113']
   - ['sdk/cosmos/fabric-cosmos-spark-auth_3/README.md', '#3113']
+  - ['sdk/cosmos/fabric-cosmos-spark-auth_4-0_2-13/README.md', '#3113']
   - ['sdk/cosmos/azure-cosmos-spark_3_2-12/dev/README.md', '#3113']
   - ['sdk/cosmos/azure-cosmos-spark_3_2-12/docs/catalog-api.md', '#3113']
   - ['sdk/cosmos/azure-cosmos-spark_3_2-12/docs/configuration-reference.md', '#3113']