Upgrade GitHub Actions to latest versions

Author: rossmacarthur

.github/workflows/build.yaml

@@ -9,8 +9,8 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
-    - uses: actions/setup-node@v4
+    - uses: actions/checkout@v6
+    - uses: actions/setup-node@v6
       with:
         node-version: '24'
     - run: npm ci
@@ -20,12 +20,12 @@ jobs:
   test:
     strategy:
       matrix:
-        os: [ubuntu-latest, macos-12, windows-latest]
+        os: [ubuntu-latest, macos-latest, windows-latest]
         repo:
           - casey/just
-          - Michael-F-Bryan/mdbook-linkcheck
+          # - Michael-F-Bryan/mdbook-linkcheck
           - rossmacarthur/sheldon
-          - rust-embedded/cross
+          # - rust-embedded/cross
           - rust-lang/mdBook
           - rustwasm/wasm-bindgen
           - sharkdp/hyperfine
@@ -41,7 +41,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     name: test (${{matrix.os}}, ${{ matrix.repo }})
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v6
     - name: Setup ${{ matrix.repo }}
       uses: ./
       with: