make sure version is correct

#69

.github/workflows/Build pkgdown site.yaml

@@ -57,6 +57,19 @@ jobs:
       run: install.packages('pkgdown')
       shell: Rscript {0}
 
+    - name: pull changes to branch if any
+      env:
+        GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+      run: |
+        git config --global user.name 'github-actions[bot]'
+        git config --global user.email 'github-actions[bot]@users.noreply.github.com'
+        if ! git diff --cached --quiet; then
+          git pull --rebase origin ${{ github.head_ref }}
+        else
+           echo "No changes to pull."
+        fi
+
+
     - name: Build pkgdown site
       run: pkgdown::build_site()
       shell: Rscript {0}