Update Flatpak manifest

zone.xiv.astra.yml

@@ -1,6 +1,6 @@
 app-id: zone.xiv.astra
 runtime: org.kde.Platform
-runtime-version: '6.6'
+runtime-version: '6.8'
 sdk: org.kde.Sdk
 sdk-extensions:
   - org.freedesktop.Sdk.Extension.rust-stable
@@ -95,13 +95,13 @@ modules:
       - /bin
     sources:
       - type: archive
-        url: https://download.qt.io/official_releases/qt/6.6/6.6.1/submodules/qtwebview-everywhere-src-6.6.1.tar.xz
-        sha256: d6de1ba33be93ae464147c9c069e115c7a24e3e475640016bc2f07c93c4a256c
+        url: https://download.qt.io/official_releases/qt/6.8/6.8.1/submodules/qtwebview-everywhere-src-6.8.1.tar.xz
+        sha256: f56bc09e9c84fa06f3955871ba37065556696c72be9c7620925eb0fd83569e22
         x-checker-data:
           - type: anitya
             project-id: 7927
             stable-only: true
-            url-template: https://download.qt.io/official_releases/qt/6.6/$version/submodules/qtwebview-everywhere-src-$version.tar.xz
+            url-template: https://download.qt.io/official_releases/qt/6.8/$version/submodules/qtwebview-everywhere-src-$version.tar.xz
   - name: corrosion
     buildsystem: cmake-ninja
     config-opts: