Fix hCaptcha hostname mismatch on dev deployment

HCaptcha__ExpectedHostname was set to staging.essentialcsharp.com but
both dev and prod share the same sitekey registered for essentialcsharp.com.
hCaptcha's siteverify always returns hostname: essentialcsharp.com for this
key, causing CaptchaService to reject every valid token on dev with
'Captcha verification failed. Please try again.'

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: BenjaminMichaelis

.github/workflows/Build-Test-And-Deploy.yml

@@ -172,7 +172,7 @@ jobs:
               AIOptions__Endpoint=secretref:ai-endpoint AIOptions__VectorGenerationDeploymentName=secretref:ai-vectordeployment AIOptions__ChatDeploymentName=secretref:ai-chatdeployment \
               AIOptions__SystemPrompt=secretref:ai-systemprompt ConnectionStrings__PostgresVectorStore=secretref:postgres-vectorstore-connectionstring \
               TryDotNet__Origin=$TRYDOTNET_ORIGIN DataProtection__AzureKeyVaultKeyUri=$KEYVAULTURI/keys/dataprotection \
-              HCaptcha__ExpectedHostname=staging.essentialcsharp.com
+              HCaptcha__ExpectedHostname=essentialcsharp.com
       - name: Logout of Azure CLI
         if: always()
         uses: azure/CLI@v3