Update docs/40_initialization.md

Co-authored-by: Kabilar Gunalan <[email protected]>

docs/40_initialization.md

@@ -406,7 +406,7 @@ style="width: 60%; height: auto; display: block; margin-left: auto;  margin-righ
 ##### Capture Sentry DSN value
 
 You'll be provided with a screen displaying how to initialize and install Sentry into your Django app. For now, just capture the DSN value.
-This value will be used later as an environment variables while deploying your API via Terraform
+This value will be used later as an environment variable while deploying your API via Terraform.
 
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