Update integration test CI config (#3502)

Summary:
Update the ubuntu image so that CI is triggered.
There is some issue with FFmpeg 4, so that CI does not succeed.
This will be is handled separately.

Pull Request resolved: https://github.com/pytorch/audio/pull/3502

Reviewed By: huangruizhe

Differential Revision: D48327431

Pulled By: mthrok

fbshipit-source-id: 5ea639f3e20c3aaf460e6030f6cb1ad2daa00172

.github/workflows/integration-test.yml

@@ -9,7 +9,7 @@ on:
 jobs:
   build:
 
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-22.04
     strategy:
       fail-fast: false
       matrix:
@@ -23,7 +23,6 @@ jobs:
         python-version: ${{ matrix.python-version }}
     - name: Install dependencies
       run: |
-        sudo add-apt-repository -y ppa:jonathonf/ffmpeg-4
         sudo apt install -y -qq libavfilter-dev libavdevice-dev
     - name: Install packages
       run: |