bump cache to rebuild packages after RcppParallel 6.0.0

Bumped to discard caches holding rstan/rstanarm built against RcppParallel < 6.0.0, which linked libtbb.so.2 (gone in 6.0.0)

Author: jgabry

.github/workflows/R-CMD-check.yaml

@@ -46,6 +46,7 @@ jobs:
         with:
           extra-packages: any::rcmdcheck, any::BH, any::RcppEigen, any::vdiffr, github::stan-dev/cmdstanr
           needs: check
+          cache-version: 2
 
       - name: Install CmdStan
         run: Rscript -e "cmdstanr::install_cmdstan()"

.github/workflows/pkgdown.yml

@@ -46,6 +46,7 @@ jobs:
             any::rstantools
             stan-dev/pkgdown-config
             local::.
+          cache-version: 2
 
       - name: Build site
         run: |

.github/workflows/test-coverage.yaml

@@ -29,6 +29,7 @@ jobs:
         with:
           extra-packages: any::covr, any::xml2, any::vdiffr, any::cmdstanr
           needs: coverage
+          cache-version: 2
 
       - name: Install CmdStan
         run: Rscript -e "cmdstanr::install_cmdstan()"