Update sentinel-guidance.md

Updated soc optimisations page

docs/onboarding/sentinel-guidance.md

@@ -55,4 +55,4 @@ Ensuring that integrations include **severity**, **classification** and **mitre
 
 ## 5. Performance and cost optimisation
 
-The [Microsoft Sentinel Optimization Workbook](https://techcommunity.microsoft.com/t5/microsoft-sentinel-blog/introducing-microsoft-sentinel-optimization-workbook/ba-p/3901489) aims to empower security teams by providing invaluable insights into your Microsoft Sentinel environment and offering recommendations to enhance cost efficiency, operational effectiveness, and overall management overview. The WASOC also offers an addtional cost reduction service through the [dedicated cluster initative](https://soc.cyber.wa.gov.au//onboarding/#24-dedicated-cluster).
+The [Microsoft SOC Optimisations page](https://learn.microsoft.com/en-us/azure/sentinel/soc-optimization/soc-optimization-access?tabs=azure-portal#access-the-soc-optimization-page) aims to empower security teams by providing invaluable insights into your Microsoft Sentinel environment and offering recommendations to enhance cost efficiency, operational effectiveness, and overall management overview. The WASOC also offers an addtional cost reduction service through the [dedicated cluster initative](https://soc.cyber.wa.gov.au//onboarding/#24-dedicated-cluster).