increment linux qt version

Signed-off-by: Trial97 <alexandru.tripon97@gmail.com>

.github/workflows/build.yml

@@ -63,7 +63,7 @@ jobs:
             qt_ver: 6
             qt_host: linux
             qt_arch: ""
-            qt_version: "6.5.3"
+            qt_version: "6.8.1"
             qt_modules: "qt5compat qtimageformats qtnetworkauth"
             linuxdeploy_hash: "4648f278ab3ef31f819e67c30d50f462640e5365a77637d7e6f2ad9fd0b4522a linuxdeploy-x86_64.AppImage"
             linuxdeploy_qt_hash: "15106be885c1c48a021198e7e1e9a48ce9d02a86dd0a1848f00bdbf3c1c92724  linuxdeploy-plugin-qt-x86_64.AppImage"
@@ -207,7 +207,6 @@ jobs:
           # Needed for ccache, but also speeds up compile
           echo "UseMultiToolTask=true" >> $env:GITHUB_ENV
 
-
       - name: Set short version
         shell: bash
         run: |