build(deps): bump julia-actions/cache from 1 to 2

Bumps [julia-actions/cache](https://github.com/julia-actions/cache) from 1 to 2.
- [Release notes](https://github.com/julia-actions/cache/releases)
- [Commits](julia-actions/cache@v1...v2)

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

Signed-off-by: dependabot[bot] <[email protected]>

Author: dependabot[bot]

.github/workflows/Documentation.yml

@@ -19,7 +19,7 @@ jobs:
       - uses: julia-actions/setup-julia@latest
         with:
           version: '1'
-      - uses: julia-actions/cache@v1
+      - uses: julia-actions/cache@v2
       - name: Install dependencies
         run: julia --project=docs/ -e 'using Pkg; Pkg.develop([PackageSpec(path=pwd()), PackageSpec(path=pwd() * "/lib/TimespanLogging"), PackageSpec(path=pwd() * "/lib/DaggerWebDash")]); Pkg.instantiate()'
       - name: Build and deploy