Update deploy_docs.yml to use metadata to use proper napari version s…

…ubstitution (#99)

# Description

See napari/napari#5509 (comment)
The docs live on napari.org don't match PR action downloaded docs when
doing napari version substitution
(#51)

This PR updates the deploy action with `fetch-depth: 0` that was added
to the PR `build_docs` action. This should make the version metadata be
correct (see pypa/setuptools-scm#480)

## Type of change
<!-- Please delete options that are not relevant. -->
- [x] Fixes or improves existing content
- [ ] Adds new content page(s)
- [ ] Fixes or improves workflow, documentation build or deployment

# References
Adresses issue noted here
napari/napari#5509 (comment)

## Final checklist:
- [x] My PR is the minimum possible work for the desired functionality

.github/workflows/deploy_docs.yml

@@ -30,6 +30,8 @@ jobs:
           path: napari-repo
           ref: main
           repository: napari/napari
+          # ensure version metadata is proper
+          fetch-depth: 0
 
       - name: Copy examples to docs folder
         run: |