message: Fix typo
  Small README typo fix
diff: @@ -83,7 +83,7 @@ These options are not required, this CLI is 0-config if you have a `build-storyb
  --ignore-last-build-on-branch [branch] Do not use the last build on this branch as a baseline if it is no longer in history (i.e. branch was rebased) [only for <branch> if specified]'
  --preserve-missing Treat missing stories as unchanged (as opposed to deleted) when comparing to the baseline'
  --no-interactive Do not prompt for package.json changes
  ---only <component:story> Only run a single story or a glob-style subset of stories (for debugging purposes
  +--only <component:story> Only run a single story or a glob-style subset of stories (for debugging purposes)
  ```
  ### Debug options
  