Update the Fedora-related descriptions and change tk-devel to tk8-devel.

Home.md

@@ -88,6 +88,15 @@ so we still recommend building against Tcl/Tk 8 as of that release.
     ```sh
     dnf install make gcc patch zlib-devel bzip2 bzip2-devel readline-devel sqlite sqlite-devel openssl-devel tk-devel libffi-devel xz-devel libuuid-devel gdbm-libs libnsl2
     ```
+    - Fedora 42 and above (Tcl/Tk 9 by default)
+
+        Fedora 42 and later ship with **Tcl/Tk 9.0** as the default. Some Python versions (for example, 3.10 and 3.11) cannot build the `_tkinter` module against Tk 9.0. To ensure compatibility, install the **Tcl/Tk 8.6 compatibility packages** instead:
+
+        ```bash
+         dnf install make gcc patch zlib-devel bzip2 bzip2-devel readline-devel sqlite sqlite-devel openssl-devel tk8-devel libffi-devel xz-devel libuuid-devel gdbm-libs libnsl2
+        ```
+
+         > **Note:** Package names for the 8.6 compatibility libraries are `tk8-devel` on Fedora 42+. 
 
     Additionally, you should install `zstd-devel` if you are building Python 3.14 or newer but note that Python requires zstd 1.4.5 or newer, which may not be available in the default package repositories.