Update build_deploy.yml to fix error in stringi.

Author: jwbowers

.github/workflows/build_deploy.yml

@@ -12,7 +12,7 @@ jobs:
           persist-credentials: false
 
       - name: Install Ubuntu Packages
-        run: sudo apt-get install -y libcurl4-openssl-dev pandoc pandoc-citeproc texlive texlive-xetex biber
+        run: sudo apt-get install -y libcurl4-openssl-dev pandoc pandoc-citeproc texlive texlive-xetex biber libicu-dev
 
       - name: Setup R
         uses: r-lib/actions/setup-r@v2