Update check-release.yaml

Trying to get the release checks to pass... add pandoc and tinytex uses.

Author: ehrlinger

.github/workflows/check-release.yaml

@@ -16,6 +16,8 @@ jobs:
       R_KEEP_PKG_SOURCE: yes
     steps:
       - uses: actions/checkout@v2
+      
+      - uses: r-lib/actions/setup-pandoc@v2
 
       - uses: r-lib/actions/setup-r@v1
         with:
@@ -25,4 +27,5 @@ jobs:
         with:
           extra-packages: rcmdcheck
 
+      - uses: r-lib/actions/setup-tinytex@v2
       - uses: r-lib/actions/check-r-package@v1