Simplify recommendation description for VMSS Flex to 300 char limit

Availability Sets aren’t being deprecated immediately but will be in the future. To improve reliability, migrate workloads to VMSS Flex for deployment across zones or within a zone across multiple fault domains (FDs). VMSS Flex offers better VM distribution control, enhancing availability.

azure-resources/Compute/virtualMachines/recommendations.yaml

@@ -40,7 +40,7 @@
   recommendationResourceType: Microsoft.Compute/virtualMachines
   recommendationMetadataState: Active
   longDescription: |
-    While Availability Sets are not scheduled for immediate deprecation, they are planned for deprecation in the future. To enhance reliability, migrate workloads from Availability Sets to VMSS Flex for deployment either across zones or within the same zone across multiple fault domains (FDs). VMSS Flex offers greater flexibility in placing VMs across fault domains, improving availability by allowing more granular control over their distribution.
+    Availability Sets aren’t being deprecated immediately but will be in the future. To improve reliability, migrate workloads to VMSS Flex for deployment across zones or within a zone across multiple fault domains (FDs). VMSS Flex offers better VM distribution control, enhancing availability.
   potentialBenefits: Enhances reliability and future-proofs VMs
   pgVerified: true
   automationAvailable: true