chore: Update changelog-1.7.md

Author: mcanouil

news/changelog-1.7.md

@@ -53,6 +53,7 @@ All changes included in 1.7:
 - ([#11699](https://github.com/quarto-dev/quarto-cli/issues/11699)): Fix crash with `video` shortcode inside HTML comments.
 - Expose new `quarto.paths.tinytex_bin_dir` in Quarto's Lua API. If TinyTeX is found by Quarto, this will be set to the path to the `bin` directory of the TinyTeX installation where command line tool are located (e.g., `pdflatex`, `tlmgr`, etc.). If TinyTeX is not found, this will be `nil`, meaning Quarto will use the system PATH to find the command line tools.
 - Fix `pandoc.mediabag` Lua typings so autocompletions work with the Lua LSP integration.
+- ([#11896](https://github.com/quarto-dev/quarto-cli/pull/11896): fix invalid PowerPoint (`pptx`) when `{{< pagebreak >}}` inserts `\f`. 
 
 ## Engines