Revert "Don't test dev knitr and rmarkdwn for now"

This reverts commit 6f80ca3.

.github/workflows/test-smokes.yml

@@ -54,7 +54,7 @@ jobs:
         if: ${{ runner.os != 'Windows' || github.event_name == 'schedule' }}
         run: npx playwright install --with-deps
         working-directory: ./tests/integration/playwright
-
+        
       - name: Install MECA validator
         if: ${{ runner.os != 'Windows' }}
         run: npm install -g meca
@@ -90,9 +90,8 @@ jobs:
           if (!requireNamespace('renv', quietly = TRUE)) install.packages('renv')
           renv::restore()
           # Install dev versions for our testing 
-          # FIXME: This is causing SSL cert issue. Put back when this is working again
-          # renv::install("yihui/knitr")
-          # renv::install("rstudio/rmarkdown")
+          renv::install("yihui/knitr")
+          renv::install("rstudio/rmarkdown")
         shell: Rscript {0}
         env:
           RENV_CONFIG_REPOS_OVERRIDE: https://packagemanager.rstudio.com/cran/latest