build(deps): bump actions/upload-artifact from 2 to 3 (#1698)

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Chris Holdgraf <choldgraf@berkeley.edu>

.github/workflows/pdf.yml

@@ -38,7 +38,7 @@ jobs:
     - name: Build PDF from HTML (Docs)
       run: |
         jb build docs --builder pdfhtml -n -W --keep-going
-    - uses: actions/upload-artifact@v2
+    - uses: actions/upload-artifact@v3
       with:
         name: PDF_HTML
         path: docs/_build/pdf/book.pdf
@@ -77,7 +77,7 @@ jobs:
     - name: Build PDF from LaTeX (Docs)
       run: |
         jb build docs --builder pdflatex -n -W --keep-going
-    - uses: actions/upload-artifact@v2
+    - uses: actions/upload-artifact@v3
       with:
         name: PDF_LATEX
         path: docs/_build/latex/book.pdf