Renaming in file in explorer does not rename its reference in markdown

[isidorn]

Testing #147738

1. Open the following file in markdown https://github.com/microsoft/vscode-docs/blob/vnext/release-notes/June_2016.md#L22
2. Add the following content

[link](./July_2016.md)

3. Open Explorer, rename the file July_2016.md. The link in markdown does not get updated 🐛

[mjbvz]

Hm, thought I already had a feature request tracking this but perhaps I repurposed that issue

Yes this is not expected to work today as the rename provider is not involved at all in this flow. I'd expected rename on files to work much like how it does for JS/TS

[mjbvz]

Reopening since the feature is still experimental