Bump actions/upload-artifact from 2 to 3 (#1271)

Bumps [actions/upload-artifact](https://github.com/actions/upload-artifact) from 2 to 3.
- [Release notes](https://github.com/actions/upload-artifact/releases)
- [Commits](https://github.com/actions/upload-artifact/compare/v2...v3)

---
updated-dependencies:
- dependency-name: actions/upload-artifact
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/srtool.yml

@@ -66,7 +66,7 @@ jobs:
 
       # it takes a while to build the runtime, so let's save the artifact as soon as we have it
       - name: Archive Artifacts for ${{ matrix.runtime }}
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v3
         with:
           name: ${{ matrix.runtime }}-runtime
           path: |
@@ -104,7 +104,7 @@ jobs:
             tee ${{ matrix.runtime }}-diff.txt
 
       - name: Archive Subwasm results
-        uses: actions/upload-artifact@v2
+        uses: actions/upload-artifact@v3
         with:
           name: ${{ matrix.runtime }}-runtime
           path: |