Fix Vale errors

Author: ppcano

.vale/Vocab/docs/accept.txt

@@ -22,6 +22,7 @@
 (?i)vu
 (?i)websocket
 (?i)ws
+(?i)js
 (?i)www
 (JS|js)lib
 [aA]shburn

src/data/markdown/docs/01 guides/02 Using k6/11 Environment variables.md

@@ -32,7 +32,7 @@ variables when running scripts by using `--include-system-env-vars=false`.
 
 An environment variable could, for example, be specified like this on the command line:
 
-<CodeGroup labels={["Bash", "Windows: CMD", "Windows: Powershell"]} lineNumbers={[false]}>
+<CodeGroup labels={["Bash", "Windows: CMD", "Windows: PowerShell"]} lineNumbers={[false]}>
 
 ```bash
 $ MY_HOSTNAME=test.k6.io k6 run script.js

src/data/markdown/docs/05 Examples/01 Examples/03 oauth-authentication.md

@@ -66,7 +66,7 @@ export function authenticateUsingAzure(
 
 ### Okta
 
-<CodeGroup labels={["okta.js"]} lineNumbers={[true]}>
+<CodeGroup labels={["Okta-test.js"]} lineNumbers={[true]}>
 
 ```javascript
 import http from 'k6/http';