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](https://github.com/julia-actions/cache/compare/v1...v2)

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

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

.github/workflows/CI.yml

@@ -52,7 +52,7 @@ jobs:
         with:
           version: ${{ matrix.julia-version }}
       - name: "Cache Julia"
-        uses: julia-actions/cache@v1
+        uses: julia-actions/cache@v2
         with:
           cache-name: ${{ matrix.os }}-test-${{ matrix.julia-version }}-${{ matrix.python-version }}
           cache-packages: false
@@ -144,7 +144,7 @@ jobs:
           activate-environment: pysr-test
           environment-file: environment.yml
       - name: "Cache Julia"
-        uses: julia-actions/cache@v1
+        uses: julia-actions/cache@v2
         with:
           cache-name: ${{ matrix.os }}-conda-${{ matrix.python-version }}
           cache-packages: false

.github/workflows/CI_Windows.yml

@@ -40,7 +40,7 @@ jobs:
         with:
           version: ${{ matrix.julia-version }}
       - name: "Cache Julia"
-        uses: julia-actions/cache@v1
+        uses: julia-actions/cache@v2
         with:
           cache-name: ${{ matrix.os }}-test-${{ matrix.julia-version }}-${{ matrix.python-version }}
           cache-packages: false

.github/workflows/CI_mac.yml

@@ -40,7 +40,7 @@ jobs:
         with:
           version: ${{ matrix.julia-version }}
       - name: "Cache Julia"
-        uses: julia-actions/cache@v1
+        uses: julia-actions/cache@v2
         with:
           cache-name: ${{ matrix.os }}-test-${{ matrix.julia-version }}-${{ matrix.python-version }}
           cache-packages: false