dep: Update actions{upload,download}-artifact (#660)

Supersedes #648 and #649

Author: flavorjones

.github/workflows/ci.yml

@@ -214,7 +214,7 @@ jobs:
           ruby-version: "3.3"
           bundler-cache: true
       - run: ./bin/test-gem-build gems ruby
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: source-gem
           path: gems
@@ -240,7 +240,7 @@ jobs:
           ruby-version: ${{ matrix.ruby }}
           apt-get: libsqlite3-dev pkg-config
           mingw: sqlite3
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: source-gem
           path: gems
@@ -276,7 +276,7 @@ jobs:
           docker run --rm -v $PWD:/work -w /work \
             ghcr.io/rake-compiler/rake-compiler-dock-image:${{ needs.native_setup.outputs.rcd_image_version }}-mri-${{ matrix.platform }} \
             ./bin/test-gem-build gems ${{ matrix.platform }}
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v5
         with:
           name: "cruby-${{ matrix.platform }}-gem"
           path: gems
@@ -314,7 +314,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: cruby-${{ matrix.platform }}-gem
           path: gems
@@ -348,7 +348,7 @@ jobs:
       - uses: ruby/setup-ruby@v1
         with:
           ruby-version: "${{ matrix.ruby }}"
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: cruby-${{ matrix.platform }}-gem
           path: gems
@@ -373,7 +373,7 @@ jobs:
       image: ruby:${{matrix.ruby}}-${{matrix.flavor}}
     steps:
       - uses: actions/checkout@v6
-      - uses: actions/download-artifact@v5
+      - uses: actions/download-artifact@v6
         with:
           name: cruby-x86_64-linux-musl-gem
           path: gems