add fedora 38, scheduled to release next week (#4785)

.ci/Fedora38/Dockerfile

@@ -0,0 +1,14 @@
+FROM fedora:38
+
+RUN dnf install -y \
+        ccache \
+        cmake \
+        gcc-c++ \
+        git \
+        mariadb-devel \
+        protobuf-devel \
+        qt6-{qttools,qtsvg,qtmultimedia,qtwebsockets}-devel \
+        rpm-build \
+        xz-devel \
+        zlib-devel \
+    && dnf clean all

.ci/release_template.md

@@ -21,6 +21,7 @@ include different targets -->
  - <kbd>Debian 11</kbd> ("Bullseye")
  - <kbd>Fedora 36</kbd>
  - <kbd>Fedora 37</kbd>
+ - <kbd>Fedora 38</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

@@ -99,6 +99,9 @@ jobs:
           - distro: Fedora37
             package: RPM
 
+          - distro: Fedora38
+            package: RPM
+
           - distro: UbuntuBionic
             package: DEB