apply suggestions from PR review

Author: Court72

articles/advisor/advisor-reference-cost-recommendations.md

@@ -175,7 +175,7 @@ We've analyzed the usage patterns of your virtual machine scale sets over the pa
 Learn more about [Virtual machine scale set - LowUsageVmss (Right-size or shutdown underutilized virtual machine scale sets)](https://aka.ms/aa_lowusagerec_vmss_learnmore).
 
 > [!TIP]  
-> If you are unsure whether you can shutdown an idle resource without causing a chaos, you can firstly restrict access to the resource. Make sure the resource's role is restricted, too. Leave the resource up for a few weeks and if nobody has connected to it or has complained, chances are the resource can be shut down safely.
+> If you're unsure whether you can shut down an idle resource without causing chaos, you can first restrict access to the resource. Make sure the resource's role is restricted, too. Leave the resource up for a few weeks, and if nobody has connected to it or has complained, chances are the resource can be shut down safely.
 
 ### Use Virtual Machines with Ephemeral OS Disk enabled to save cost and get better performance