go-api(staging): lower sentry sample rate

avoid pushing to much data to self hosted sentry

Author: thenav56

applications/go-api/helm/ifrcgo-helm/values-staging.yaml

@@ -20,7 +20,7 @@ env:
   GO_ENVIRONMENT: staging
   IFRC_TRANSLATION_DOMAIN: https://ifrc-translationapi-staging.azurewebsites.net
   SENTRY_DSN: https://342632f67ea942c9bde214c0bb7e91be@sentry.northeurope.cloudapp.azure.com/2
-  SENTRY_SAMPLE_RATE: "0.9"
+  SENTRY_SAMPLE_RATE: "0.3"
 
 api:
   domain: goadmin-stage.ifrc.org