ci: the problem is actually with -Dcpu=baseline

TODO: figure out how to work around it....

.github/workflows/main.yml

@@ -15,7 +15,7 @@ jobs:
   build:
     strategy:
       matrix:
-        os: [ubuntu-20.04, windows-2022, macos-12]
+        os: [ubuntu-latest, windows-latest, macos-latest]
     runs-on: ${{matrix.os}}
     steps:
       - uses: goto-bus-stop/setup-zig@v2
@@ -30,7 +30,7 @@ jobs:
         if: runner.os == 'Linux'
         run: |
             sudo apt update
-            sudo apt install libgtk-3-dev libsdl2-dev pkg-config
+            sudo apt install libgtk-3-dev libsdl2-dev
       - name: prepare-windows
         if: runner.os == 'Windows'
         run: |