docs: replace deprecated set-output (#800)

As of October 2022, the `set-output` construct is deprecated by GitHub for GitHub Actions. Source:

https://github.blog/changelog/2022-10-11-github-actions-deprecating-save-state-and-set-output-commands/

This commit changes the use of the construct for the Sphinx example in the README.md file.
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Mike Hucka 2022-11-21 18:11:33 -08:00 committed by GitHub
parent e3b45f2700
commit 7166f2caa4
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@ -976,7 +976,7 @@ jobs:
- name: Get pip cache dir
id: pip-cache
run: echo "::set-output name=dir::$(pip cache dir)"
run: echo "dir=$(pip cache dir)" >> $GITHUB_OUTPUT
- name: Cache dependencies
uses: actions/cache@v3