ci: Move the actions to their Node 24 releases

The runners now default to Node 24 and warn on every step that the
Node 20 actions are deprecated. Bumps all four to the current majors,
which declare runs.using: node24:

  actions/checkout          v4 -> v7
  actions/setup-dotnet      v4 -> v6
  actions/upload-artifact   v4 -> v7
  actions/download-artifact v4 -> v8

Four majors is a wide jump, so the inputs the workflow depends on were
checked rather than assumed: pattern and merge-multiple still exist on
download-artifact, which the cross-job local feed assembly relies on, as
do if-no-files-found on upload-artifact and dotnet-version on
setup-dotnet.

Co-Authored-By: Claude Opus 5 <noreply@anthropic.com>

Author: henrikosorensen

.github/workflows/build.yml

@@ -27,14 +27,14 @@ jobs:
     name: native (linux + windows RIDs)
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
       - name: Cross-compile and pack
         env:
           DOCKER_BUILDKIT: '1'
         run: ./build.sh
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: packages-native-linux
           path: packages/*.nupkg
@@ -45,16 +45,16 @@ jobs:
     name: native (macOS RIDs)
     runs-on: macos-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
-      - uses: actions/setup-dotnet@v4
+      - uses: actions/setup-dotnet@v6
         with:
           dotnet-version: '8.0.x'
 
       - name: Build and pack
         run: sh ./build/build_runtime_macos_packages.sh
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: packages-native-macos
           path: packages/*.nupkg
@@ -76,14 +76,14 @@ jobs:
       matrix:
         os: [ubuntu-latest, windows-latest, macos-latest]
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
-      - uses: actions/setup-dotnet@v4
+      - uses: actions/setup-dotnet@v6
         with:
           dotnet-version: '8.0.x'
 
       - name: Collect runtime packages into a local feed
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           pattern: packages-native-*
           merge-multiple: true
@@ -111,14 +111,14 @@ jobs:
     needs: [native-linux, native-macos]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v7
 
-      - uses: actions/setup-dotnet@v4
+      - uses: actions/setup-dotnet@v6
         with:
           dotnet-version: '8.0.x'
 
       - name: Collect runtime packages into a local feed
-        uses: actions/download-artifact@v4
+        uses: actions/download-artifact@v8
         with:
           pattern: packages-native-*
           merge-multiple: true
@@ -131,7 +131,7 @@ jobs:
           SKIP_TESTS: '1'
         run: sh ./build/build_managed_packages.sh
 
-      - uses: actions/upload-artifact@v4
+      - uses: actions/upload-artifact@v7
         with:
           name: packages-managed
           path: packages/*.nupkg
@@ -150,11 +150,11 @@ jobs:
     needs: [native-linux, native-macos, test, managed]
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/setup-dotnet@v4
+      - uses: actions/setup-dotnet@v6
         with:
           dotnet-version: '8.0.x'
 
-      - uses: actions/download-artifact@v4
+      - uses: actions/download-artifact@v8
         with:
           pattern: packages-*
           merge-multiple: true