message: Update git repo unreachable error to warning and better msg
diff: @@ -77,7 +77,7 @@ const GitSection: React.FC<GitSectionProps> = ({ showSample, builderImages }) =>
  } else {
  setFieldValue('image.recommended', '');
  setFieldValue('image.couldNotRecommend', false);
  - setValidated(ValidatedOptions.error);
  + setValidated(ValidatedOptions.warning);
  }
  },
  [
  @@ -151,8 +151,8 @@ const GitSection: React.FC<GitSectionProps> = ({ showSample, builderImages }) =>
  if (validated === ValidatedOptions.success) {
  return 'Validated';
  }
  - if (validated === ValidatedOptions.error) {
  - return 'Git repository is not reachable.';
  + if (validated === ValidatedOptions.warning) {
  + return 'URL is valid but cannot be reached. If this is a private repository, enter a source secret in Advanced Git Options';
  }
  return '';
  };
  