Also fix RStudio links for Mac and Linux

Author: fkohrt

_includes/install_instructions/r.html

@@ -41,7 +41,7 @@ <h4>Video Tutorial</h4>
           <a href="https://cran.r-project.org/bin/macosx/R-latest.pkg">this .pkg file</a>
           from <a href="https://cran.r-project.org/index.html">CRAN</a>.
           Also, please install the
-          <a href="https://www.rstudio.com/products/rstudio/download/#download">RStudio IDE</a>.
+          <a href="https://posit.co/download/rstudio-desktop/">RStudio IDE</a>.
         </p>
         <h4>Video Tutorial</h4>
         <div class="yt-wrapper2">
@@ -59,7 +59,7 @@ <h4>Video Tutorial</h4>
           <code>sudo dnf install R</code> and for Debian/Ubuntu, add a ppa
           repository and then run <code>sudo apt-get install r-base</code>).
           Also, please install the
-          <a href="https://www.rstudio.com/products/rstudio/download/#download">RStudio IDE</a>.
+          <a href="https://posit.co/download/rstudio-desktop/">RStudio IDE</a>.
         </p>
       </article>
     </div>