Merge PR #5153 from @krdmnbrk - Add AttackRuleMap to README.md

chore: add `AttackRuleMap` project to README.md

README.md

@@ -93,6 +93,7 @@ If you find a false positive or would like to propose a new detection rule idea
 * [alterix](https://github.com/mtnmunuklu/alterix) - Converts Sigma rules to the query language of CRYPTTECH's SIEM
 * [AttackIQ](https://www.attackiq.com/2024/01/10/sigmaiq-attackiqs-latest-innovation-for-actionable-detections/) - Sigma Rules integrated in AttackIQ's platform, and [SigmAIQ](https://github.com/AttackIQ/SigmAIQ) for Sigma rule conversion and LLM apps
 * [Atomic Threat Coverage](https://github.com/atc-project/atomic-threat-coverage) (Since December 2018)
+* [AttackRuleMap - Mapping of Atomic Red Team tests and Sigma Rules](https://attackrulemap.com/)
 * [Confluent Sigma](https://github.com/confluentinc/confluent-sigma) - Kafka Streams supported Sigma rules
 * [IBM QRadar](https://community.ibm.com/community/user/security/blogs/gladys-koskas1/2023/08/02/qradar-natively-supports-sigma-for-rules-creation)
 * [Impede Detection Platform](https://impede.ai/)