Clean up ffmpeg build dependencies

TIL you shouldn't really run `apt-get upgrade` in GitHub CI.
Also removed some packages that are guaranteed to be installed already.

.github/workflows/build-ffmpeg.yml

@@ -69,8 +69,8 @@ jobs:
 
  - name: Install dependencies
  run: |
- sudo apt-get update && sudo apt-get upgrade
- sudo apt-get install -y make nasm gcc mingw-w64
+ sudo apt-get update
+ sudo apt-get install nasm mingw-w64
 
  - name: Build
  run: osu.Framework.NativeLibs/scripts/ffmpeg/build-win.sh
@@ -111,8 +111,8 @@ jobs:
  steps:
  - name: Install dependencies
  run: |
- sudo apt-get update && sudo apt-get upgrade
- sudo apt-get install -y git curl gcc make nasm pkg-config libva-dev libvdpau-dev
+ sudo apt-get update
+ sudo apt-get install nasm libva-dev libvdpau-dev
 
  - name: Checkout
  uses: actions/checkout@v3