Update Rfast installation

Author: sterrettJD

.github/workflows/document.yaml

@@ -22,15 +22,17 @@ jobs:
       - uses: r-lib/actions/setup-r@v2
         with:
           use-public-rspm: true
-          
-      - name: Install system dependencies
-      # required for Rfast
-        run: sudo apt-get install -y libgomp1
 
       - uses: r-lib/actions/setup-r-dependencies@v2
         with:
           extra-packages: any::roxygen2
           needs: pr-document
+      
+      - name: Specific Rfast dependency
+        run: |
+          install.packages("remotes")
+          remotes::install_version("Rfast", version = "2.0.8")  # Ensure Rfast is installed
+        shell: Rscript {0}
 
       - name: Document
         run: roxygen2::roxygenise()