[PATCH] lisp/ox-html.el: Add avif support for html export inline images

[Ross Timson <me@rosstimson.com>]

* lisp/ox-html.el (org-html-inline-image-rules): Add AVIF image
support for inline images on HTML export.

AVIF is well supported by browsers these days and offers similar
features and much better compression than the other image formats
commonly used for the web.

TINYCHANGE
---
 lisp/ox-html.el | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/lisp/ox-html.el b/lisp/ox-html.el
index baca21014..5234b634d 100644
--- a/lisp/ox-html.el
+++ b/lisp/ox-html.el
@@ -861,9 +861,9 @@ link to the image."
   :type 'boolean)
 
 (defcustom org-html-inline-image-rules
-  `(("file" . ,(regexp-opt '(".jpeg" ".jpg" ".png" ".gif" ".svg" ".webp")))
-    ("http" . ,(regexp-opt '(".jpeg" ".jpg" ".png" ".gif" ".svg" ".webp")))
-    ("https" . ,(regexp-opt '(".jpeg" ".jpg" ".png" ".gif" ".svg" ".webp"))))
+  `(("file" . ,(regexp-opt '(".jpeg" ".jpg" ".png" ".gif" ".svg" ".webp" ".avif")))
+    ("http" . ,(regexp-opt '(".jpeg" ".jpg" ".png" ".gif" ".svg" ".webp" ".avif")))
+    ("https" . ,(regexp-opt '(".jpeg" ".jpg" ".png" ".gif" ".svg" ".webp" ".avif"))))
   "Rules characterizing image files that can be inlined into HTML.
 A rule consists in an association whose key is the type of link
 to consider, and value is a regexp that will be matched against
-- 
2.44.0