Update Github Actions to use ubuntu-22.04

Author: bvschaik

.github/workflows/main.yml

@@ -14,22 +14,22 @@ jobs:
       matrix:
         include:
           - name: Linux Flatpak
-            os: ubuntu-20.04
+            os: ubuntu-22.04
             BUILD_TARGET: flatpak
             DEPLOY: flatpak
           - name: Linux AppImage
-            os: ubuntu-20.04
+            os: ubuntu-22.04
             BUILD_TARGET: appimage
             DEPLOY: appimage
           - name: Linux x64
-            os: ubuntu-20.04
+            os: ubuntu-22.04
             cache-key: linux-x64
             SDL_VERSION: 2.30.9
             SDL_MIXER_VERSION: 2.8.0
             BUILD_TARGET: linux
             DEPLOY: linux
           - name: Linux x64 (old SDL versions)
-            os: ubuntu-20.04
+            os: ubuntu-22.04
             cache-key: linux-x64
             SDL_VERSION: 2.0.0
             SDL_MIXER_VERSION: 2.0.0
@@ -51,15 +51,15 @@ jobs:
             BUILD_TARGET: ios
             DEPLOY: ios
           - name: Nintendo Switch
-            os: ubuntu-20.04
+            os: ubuntu-22.04
             BUILD_TARGET: switch
             DEPLOY: switch
           - name: PS Vita
-            os: ubuntu-20.04
+            os: ubuntu-22.04
             BUILD_TARGET: vita
             DEPLOY: vita
           - name: Android
-            os: ubuntu-20.04
+            os: ubuntu-22.04
             cache-key: android
             SDL_VERSION: 2.30.9
             SDL_MIXER_VERSION: 2.8.0