gi-docgen: upgrade 2025.3 -> 2025.4

Changelog:
===========
Added:
- Add online attribute for devhelp index
- Include type data in the field template

Fixed:
- Use normal font size for enumeration values description

(From OE-Core rev: cd0f60afe129d31cdb25343ea7a96509cd14a16a)

Signed-off-by: Wang Mingyu <wangmy@fujitsu.com>
Signed-off-by: Mathieu Dubois-Briand <mathieu.dubois-briand@bootlin.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

meta/recipes-gnome/gi-docgen/gi-docgen_2025.3.bb → meta/recipes-gnome/gi-docgen/gi-docgen_2025.4.bb

@@ -10,7 +10,7 @@ LIC_FILES_CHKSUM = "file://gi-docgen.py;beginline=1;endline=5;md5=2dc0f1f0120247
 
 SRC_URI = "git://gitlab.gnome.org/GNOME/gi-docgen.git;protocol=https;branch=main"
 
-SRCREV = "9ab2ab8fa3f4a04f5d2cc24b0c8e91e73bc57b51"
+SRCREV = "0517026e0bf51b3776efa4689da44ea0c99e343e"
 
 inherit python_setuptools_build_meta