update phrasing in Ui error message (#1702)

airbyte-webapp/src/locales/en.json

@@ -69,7 +69,7 @@
   "form.imageCannotFound": "The docker image cannot be found. Please ensure that the input tag points to a valid Airbyte docker image",
   "form.loadingConfiguration": "Loading required configuration parameters for {connector}",
   "form.pattern.error": "Note: The value must match the pattern {pattern}",
-  "form.schemaFailed": "Fetching the schema is failed. Please try again",
+  "form.schemaFailed": "Failed to fetch schema. Please try again",
   "form.tryAgain": "Try again",
   "form.noNeed": "No need!",
   "form.reset": "Reset",
@@ -99,7 +99,7 @@
   "onboarding.setUpConnection": "Set up connection",
   "onboarding.setConnection": "Set up the connection",
   "onboarding.instructionsLink": "See instructions how to connect {name}",
-  "onboarding.fetchingSchema": "We are fetching the schema of your data source.\nThis should take less than a minute...",
+  "onboarding.fetchingSchema": "We are fetching the schema of your data source. \nThis should take less than a minute, but may take a few minutes on slow internet connections or data sources with a large amount of tables.",
   "onboarding.tutorial": "Check how you can sync PostgreSQL databases in minutes",
   "onboarding.skipOnboarding": "Skip Onboarding",