Update cmdstan version to 2.36.0 in GitHub Action and update cmdstanr installation.

Author: tillahoffmann

Diff for: .github/workflows/main.yml

@@ -8,7 +8,7 @@ on:
   workflow_dispatch:
 
 env:
-  cmdstanVersion: "2.31.0"
+  cmdstanVersion: "2.36.0"
 
 jobs:
   build:
@@ -28,6 +28,6 @@ jobs:
         with:
           extra-packages: |
             any::rcmdcheck
-            cmdstanr=url::https://mc-stan.org/r-packages/src/contrib/cmdstanr_0.7.0.tar.gz
+            cmdstanr=url::https://stan-dev.r-universe.dev/src/contrib/cmdstanr_0.8.1.tar.gz
           needs: check
       - uses: r-lib/actions/check-r-package@v2

Diff for: DESCRIPTION

@@ -23,5 +23,5 @@ Suggests:
     rmarkdown,
     cmdstanr
 Additional_repositories:
-    https://mc-stan.org/r-packages/
+    https://stan-dev.r-universe.dev
 VignetteBuilder: knitr