fix(emacs): typo

Fixes quarto-dev/quarto-cli#12411

Author: mcanouil

docs/computations/r.qmd

@@ -124,8 +124,8 @@ You can read more about using VS Code in [Tools: VS Code](/docs/tools/vscode.qmd
 The [quarto-mode](https://melpa.org/#/quarto-mode) MELPA package is an Emacs mode for editing Quarto documents. Install `quarto-mode` as follows:
 
 ``` default
-M-x refresh-package-contents
-M-x install-package
+M-x package-refresh-contents
+M-x package-install
   quarto-mode
 ```