Update GitHub Actions dependencies to latest major versions (#5)

Co-authored-by: Claude Sonnet 4.6 <noreply@anthropic.com>

Author: fonsp

.github/workflows/CI.yml

@@ -22,15 +22,15 @@ jobs:
           - os: windows-latest
             version: '1'
     steps:
-      - uses: actions/checkout@v4
-      - uses: julia-actions/setup-julia@v2
+      - uses: actions/checkout@v6
+      - uses: julia-actions/setup-julia@v3
         with:
           version: ${{ matrix.version }}
-      - uses: julia-actions/cache@v2
+      - uses: julia-actions/cache@v3
       - uses: julia-actions/julia-buildpkg@v1
       - uses: julia-actions/julia-runtest@v1
       - uses: julia-actions/julia-processcoverage@v1
-      - uses: codecov/codecov-action@v4
+      - uses: codecov/codecov-action@v6
         with:
           files: lcov.info
           token: ${{ secrets.CODECOV_TOKEN }}

.github/workflows/CompatHelper.yml

@@ -10,7 +10,7 @@ jobs:
   CompatHelper:
     runs-on: ubuntu-latest
     steps:
-      - uses: julia-actions/setup-julia@v2
+      - uses: julia-actions/setup-julia@v3
         with:
           version: '1'
       - name: Pkg.add CompatHelper

.github/workflows/Documentation.yml

@@ -11,11 +11,11 @@ jobs:
       contents: write
       statuses: write
     steps:
-      - uses: actions/checkout@v4
-      - uses: julia-actions/setup-julia@v2
+      - uses: actions/checkout@v6
+      - uses: julia-actions/setup-julia@v3
         with:
           version: '1'
-      - uses: julia-actions/cache@v2
+      - uses: julia-actions/cache@v3
       - name: Install docs dependencies
         run: julia --project=docs -e 'using Pkg; Pkg.develop(PackageSpec(path=pwd())); Pkg.instantiate()'
       - name: Build and deploy