use frozen CRAN repo for 4.0.4

Author: slager

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

@@ -34,12 +34,21 @@ jobs:
 
       - uses: r-lib/actions/setup-pandoc@v2
 
-      - uses: r-lib/actions/setup-r@v2
+      - name: Setup recent R
+        uses: r-lib/actions/setup-r@v2
+        if: ${{ matrix.config.r != '4.0.4' }}
         with:
           r-version: ${{ matrix.config.r }}
           http-user-agent: ${{ matrix.config.http-user-agent }}
           use-public-rspm: true
 
+      - name: Setup R 4.0.4
+        uses: r-lib/actions/setup-r@v2
+        if: ${{ matrix.config.r == '4.0.4' }}
+        with:
+          r-version: ${{ matrix.config.r }}
+          cran: 'https://packagemanager.posit.co/cran/__linux__/noble/2024-04-19'
+
       - uses: r-lib/actions/setup-tinytex@v2
 
       - uses: r-lib/actions/setup-r-dependencies@v2