ci: update github actions to v3

Author: jsm174

.github/workflows/build.yml

@@ -26,7 +26,7 @@ jobs:
           - os: ubuntu-latest
             rid: android-arm64-v8a
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: actions/setup-dotnet@v1
         with:
           dotnet-version: '3.1.x'
@@ -41,7 +41,7 @@ jobs:
       - run: |
           mkdir tmp
           cp -r VisualPinball.Engine.PinMAME.Unity/Plugins/${{ matrix.rid }} tmp
-      - uses: actions/upload-artifact@v2
+      - uses: actions/upload-artifact@v3
         with:
           name: Plugins
           path: tmp

.github/workflows/publish.yml

@@ -7,7 +7,7 @@ jobs:
   registry:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
       - uses: dawidd6/action-download-artifact@v2
         with:
           workflow: build

.github/workflows/release.yml

@@ -7,7 +7,7 @@ jobs:
   release:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 0
       - name: Fetch next version