Bump julia-actions/cache from 1 to 2 (#77)

* 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]>

* Remove arch specifier

---------

Signed-off-by: dependabot[bot] <[email protected]>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>
Co-authored-by: Phillip Alday <[email protected]>

.github/workflows/ci.yml

@@ -15,7 +15,7 @@ on:
         - main
 jobs:
   test:
-    name: Julia ${{ matrix.version }} - R ${{ matrix.R }}- ${{ matrix.os }} - ${{ matrix.arch }}
+    name: Julia ${{ matrix.version }} - R ${{ matrix.R }}- ${{ matrix.os }}
     runs-on: ${{ matrix.os }}
     strategy:
       fail-fast: false
@@ -29,8 +29,6 @@ jobs:
           # - ubuntu-latest # linux currently doesn't work because of lib issues
           - macOS-latest
           # - windows-latest # Windows compiles *everything* and takes far too long
-        arch:
-          - x64
     steps:
       - name: Checkout
         uses: actions/checkout@v4
@@ -44,9 +42,8 @@ jobs:
         uses: julia-actions/setup-julia@v1
         with:
           version: ${{ matrix.version }}
-          arch: ${{ matrix.arch }}
       - name: Cache
-        uses: julia-actions/cache@v1
+        uses: julia-actions/cache@v2
         with:
             cache-compiled: "true"
       - name: Build