Add to changelog

Author: cderv

news/changelog-1.8.md

@@ -2,13 +2,17 @@ All changes included in 1.8:
 
 ## Formats
 
+### `html`
+
+- ([#12259](https://github.com/quarto-dev/quarto-cli/issues/12259)): Fix conflict between `html-math-method: katex` and crossref popups (author: @benkeks).
+
 ### `revealjs`
 
 - ([#12598](https://github.com/quarto-dev/quarto-cli/pull/12598)): Ensure `.fragment` on an image with caption applies to whole figure.
 
 ### `docx`
 
-- ([#8392](https://github.com/quarto-dev/quarto-cli/issues/8392)): Fix `docx` generation issues in tables 
+- ([#8392](https://github.com/quarto-dev/quarto-cli/issues/8392)): Fix `docx` generation issues in tables
 
 ## Projects