Update R-CMD-check.yaml

Attempt to fix vignette failing to compile error

Author: veseshan

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

@@ -34,6 +34,8 @@ jobs:
 
       - uses: r-lib/actions/setup-pandoc@v2
 
+      - uses: r-lib/actions/setup-tinytex@v1
+
       - uses: r-lib/actions/setup-r@v2
         with:
           r-version: ${{ matrix.config.r }}