ci(deps): bump actions/cache from 4 to 5

Bumps [actions/cache](https://github.com/actions/cache) from 4 to 5.
- [Release notes](https://github.com/actions/cache/releases)
- [Changelog](https://github.com/actions/cache/blob/main/RELEASES.md)
- [Commits](https://github.com/actions/cache/compare/v4...v5)

---
updated-dependencies:
- dependency-name: actions/cache
  dependency-version: '5'
  dependency-type: direct:production
  update-type: version-update:semver-major
...

Signed-off-by: dependabot[bot] <support@github.com>

.github/workflows/build.yml

@@ -42,7 +42,7 @@ jobs:
           echo "DATE=$(date --rfc-3339=date)" >> "$GITHUB_ENV"
 
       - name: Cache NuGet packages
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: _cache/nuget
           key: nuget-${{ runner.os }}-${{ hashFiles('src/Directory.Packages.props', 'src/**/*.csproj', 'global.json') }}
@@ -50,7 +50,7 @@ jobs:
             nuget-${{ runner.os }}-
 
       - name: Cache Node modules
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: |
             _cache/node
@@ -60,7 +60,7 @@ jobs:
             node-${{ runner.os }}-
 
       - name: Cache MSBuild outputs
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: _cache/msbuild
           key: msbuild-${{ runner.os }}-${{ hashFiles('src/**/*.cs', 'src/**/*.csproj', 'src/**/*.targets', 'src/**/*.props') }}
@@ -69,7 +69,7 @@ jobs:
             msbuild-${{ runner.os }}-
 
       - name: Cache Webpack
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: _cache/webpack
           key: webpack-${{ runner.os }}-${{ hashFiles('frontend/src/**/*', 'yarn.lock') }}