.github/workflows: Sync LLVM apt repository version with runner version

Make sure we use the right apt repository for the version of Ubuntu used as the
workflow runner. Explicitly select ubuntu-22.04 (instead of ubuntu-latest) to
make sure the distro version doesn't change out from under us when Github
updates their runner config.

Signed-off-by: Toke Høiland-Jørgensen <[email protected]>

Author: tohojo

.github/workflows/selftests.yml

@@ -8,7 +8,7 @@ on:
 
 jobs:
   build:
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     strategy:
       matrix:
         KERNEL_VERSION:
@@ -39,7 +39,7 @@ jobs:
       - name: Prepare Clang
         run: |
           wget -O - https://apt.llvm.org/llvm-snapshot.gpg.key | sudo apt-key add -
-          echo "deb http://apt.llvm.org/focal/ llvm-toolchain-focal-16 main" | sudo tee -a /etc/apt/sources.list
+          echo "deb http://apt.llvm.org/jammy/ llvm-toolchain-jammy-16 main" | sudo tee -a /etc/apt/sources.list
           sudo apt-get -qq update
           sudo apt-get -qq -y install clang-16 lld-16 llvm-16
       - name: Install latest bpftool