Separators deprecation message when using ${obj.attr} in Meta title

[Finrod927]

Describe the bug
I just started to migrate to SB 6 and I get the deprecation message about hierarchy separators even if I already used '/' as separator. It seems to be caused by using ${obj.attr} in the Meta title: I import the package.json file to insert the version number in the sidebar:

import pkg from '../package.json'
import { Meta } from '@storybook/addon-docs/blocks'

<Meta title={`Docs v${pkg.version}/Changelog`} />

Probably a too generic regex.

To Reproduce
Steps to reproduce the behavior:

1. Create a .mdx file with the example above
2. Check the browser console

Expected behavior
No deprecation message

System

  System:
    OS: Windows 10 10.0.19041
    CPU: (12) x64 Intel(R) Core(TM) i7-8700 CPU @ 3.20GHz
  Binaries:
    Node: 12.18.2 - C:\Program Files\nodejs\node.EXE
    npm: 6.14.6 - C:\Program Files\nodejs\npm.CMD
  Browsers:
    Chrome: 86.0.4240.75
    Edge: Spartan (44.19041.423.0), Chromium (85.0.564.68)
  npmPackages:
    @storybook/addon-actions: ^6.0.26 => 6.0.26
    @storybook/addon-docs: ^6.0.26 => 6.0.26
    @storybook/addon-knobs: ^6.0.26 => 6.0.26
    @storybook/addon-links: ^6.0.26 => 6.0.26
    @storybook/addon-storyshots: ^6.0.26 => 6.0.26
    @storybook/vue: ^6.0.26 => 6.0.26

[stale]

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[pouretrebelle]

I'm having the same problem, caused by having .s in a story title. I've chosen to do as suggested in #9761 (comment) and use a ․ homoglyph (alternative unicode character) instead of the periods. In your case you could do ${pkg.version.replace(/\./g, '․')}