Bump baipp to v2 (#614)

Author: Tinche

.github/workflows/pypi-package.yml

@@ -21,7 +21,7 @@ jobs:
           fetch-depth: 0
           persist-credentials: false
 
-      - uses: hynek/build-and-inspect-python-package@v1
+      - uses: hynek/build-and-inspect-python-package@v2
 
   # Upload to Test PyPI on every commit on main.
   release-test-pypi:
@@ -35,7 +35,7 @@ jobs:
 
     steps:
       - name: Download packages built by build-and-inspect-python-package
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: Packages
           path: dist
@@ -57,7 +57,7 @@ jobs:
 
     steps:
       - name: Download packages built by build-and-inspect-python-package
-        uses: actions/download-artifact@v3
+        uses: actions/download-artifact@v4
         with:
           name: Packages
           path: dist