chore: upgrade broken GitHub Actions

https://github.com/orgs/community/discussions/142581

Signed-off-by: Anders Kaseorg <andersk@mit.edu>

Author: andersk

.github/workflows/ci.yml

@@ -37,7 +37,7 @@ jobs:
           files: ./coverage/lcov.info
           fail_ci_if_error: true
       - name: Collect artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: "failure() && matrix.stage != 'unit'"
         with:
           name: Image snapshots (${{ matrix.stage }})

.github/workflows/update-storyshots.yml

@@ -21,7 +21,7 @@ jobs:
       - name: Update snapshots
         run: pnpm test:storyshots -u
       - name: Collect artifacts
-        uses: actions/upload-artifact@v3
+        uses: actions/upload-artifact@v4
         if: always()
         with:
           name: Updated storyshots