feat(index): add link to strategy unit model

Author: amyheather

index.qmd

@@ -33,7 +33,7 @@ The material is designed for analysts, researchers, and students in health and o
 
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-"The DES RAP Book was a valuable resource in our transition to open-source DES modelling. It provided us with a step-by-step structure to follow and guidance on best practice for writing code, tests and documentation for our package. Our model is being using in the Midlands, and beyond, for understanding future demand and capacity within Kidney Replacement Therapy." - **Lucy Morgan, Analytics Manager at The Strategy Unit**.
+"The DES RAP Book was a valuable resource in our transition to open-source DES modelling. It provided us with a step-by-step structure to follow and guidance on best practice for writing code, tests and documentation for our package. [Our model](https://www.strategyunitwm.nhs.uk/news/planning-rising-renal-demand-simulating-capacity-across-care-system) is being using in the Midlands, and beyond, for understanding future demand and capacity within Kidney Replacement Therapy." - **Lucy Morgan, Analytics Manager at The Strategy Unit**.
 
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