PR review: Update speech-container-faq.yml

Add missing word.

Author: AnnaMHuff

articles/ai-services/speech-service/speech-container-faq.yml

@@ -55,7 +55,7 @@ sections:
           
           > 2 (clusters) * 5 (VMs per cluster) * $0.3528/hour * 365 (days) * 24 (hours) = $31 K / year
           
-          When mapping to physical machine, a general estimation is 1 vCPU = 1 Physical CPU Core. In reality, 1vCPU is more powerful than a single core.
+          When mapping to a physical machine, a general estimation is 1 vCPU = 1 Physical CPU Core. In reality, 1vCPU is more powerful than a single core.
           
           For on-premises, all of these extra factors come into play: