Remove Fedora 38 Build and Add Fedora 40 Build (#5024)

* Remove Fedora 38 docker image

* Add Fedora 40 Dockerfile

* Remove Fedora 38, Add Fedora 40 to release template

* Remove Fedora 38, add Fedora 40 to desktop-build

.ci/Fedora40/Dockerfile

@@ -1,4 +1,4 @@
-FROM fedora:38
+FROM fedora:40
 
 RUN dnf install -y \
         ccache \

.ci/release_template.md

@@ -18,8 +18,8 @@ include different targets -->
  - <kbd>Ubuntu 24.04 LTS</kbd> ("Noble Numbat")
  - <kbd>Debian 11</kbd> ("Bullseye")
  - <kbd>Debian 12</kbd> ("Bookworm")
- - <kbd>Fedora 38</kbd>
  - <kbd>Fedora 39</kbd>
+ - <kbd>Fedora 40</kbd>
 <kbd>We are also packaged in Arch Linux's official community repository, courtesy of @FFY00</kbd></i>
 <kbd>General Linux support is available via a flatpak package (Flathub)</kbd></i>
 </pre>

.github/workflows/desktop-build.yml

@@ -97,10 +97,10 @@ jobs:
           - distro: Debian12
             package: DEB
 
-          - distro: Fedora38
+          - distro: Fedora39
             package: RPM
 
-          - distro: Fedora39
+          - distro: Fedora40
             package: RPM
 
           - distro: UbuntuBionic