message: Clarify what semver.valid is for
diff: @@ -70,7 +70,7 @@ const findViewlayer = async ({ env, log, options, packageJson }) => {
  // Allow setting Storybook version via CHROMATIC_STORYBOOK_VERSION='@storybook/react@4.0-alpha.8' for unusual cases
  if (env.CHROMATIC_STORYBOOK_VERSION) {
  const [, p, v] = env.CHROMATIC_STORYBOOK_VERSION.match(/(.+)@(.+)$/) || [];
  - const version = semver.valid(v);
  + const version = semver.valid(v); // ensures we get a specific version, not a range
  if (!p || !version) {
  throw new Error(
  'Invalid CHROMATIC_STORYBOOK_VERSION; expecting something like "@storybook/react@6.2.0".'
  