Bump actions/cache from 3.0.5 to 3.0.8

Bumps [actions/cache](https://github.com/actions/cache) from 3.0.5 to 3.0.8.
- [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/v3.0.5...v3.0.8)

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

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

Closes #36

Change-Id: I160957693ddb7db1a29027b9344782a34b77524c
diff --git a/.github/workflows/pythonpackage.yml b/.github/workflows/pythonpackage.yml
index 96efb4e..9bca603 100644
--- a/.github/workflows/pythonpackage.yml
+++ b/.github/workflows/pythonpackage.yml
@@ -20,7 +20,7 @@
       with:
         python-version: ${{ matrix.python-version }}
     - name: Cache pip
-      uses: actions/cache@v3.0.5
+      uses: actions/cache@v3.0.8
       with:
         # This path is specific to Ubuntu
         path: ~/.cache/pip
@@ -44,13 +44,13 @@
     - name: Install R dependencies
       run: Rscript -e "install.packages('RKorAPClient')"
     - name: Cache R packages on Linux
-      uses: actions/cache@v3.0.5
+      uses: actions/cache@v3.0.8
       with:
         path: /usr/local/lib/R/site-library
         key: ${{ runner.os }}-r-${{ matrix.config.r-version }}-${{ hashFiles('DESCRIPTION') }}
       if: runner.os == 'Linux'
     - name: Cache R packages
-      uses: actions/cache@v3.0.5
+      uses: actions/cache@v3.0.8
       with:
         path: ${{ env.R_LIBS_USER }}
         key: ${{ runner.os }}-r-${{ matrix.config.r-version }}-${{ hashFiles('DESCRIPTION') }}