GCC 11.2 needed for kernel>=5.17. Updated Ubuntu

Removed workaround for libc6 (already on 22.04 LTS).

.github/workflows/build.yml

@@ -25,7 +25,6 @@ jobs:
 
   build:
     needs: commontasks
-    runs-on: ubuntu-latest
     strategy:
       fail-fast: false
       matrix: 
@@ -37,6 +36,7 @@ jobs:
             version: $(uname -r)
             use_apt: true
 
+    runs-on: ubuntu-22.04
     steps:
     - name: install deb packages
       env: 
@@ -51,7 +51,6 @@ jobs:
         [  -z "$AMD64_DEB" ] && exit 2
         wget -nv ${KERNEL_URL}v${VERSION}/$AMD64_DEB
         wget -nv ${KERNEL_URL}v${VERSION}/$ALL_DEB
-        wget -nv http://mirrors.edge.kernel.org/ubuntu/pool/main/g/glibc/libc6_2.34-0ubuntu3_amd64.deb
         sudo dpkg --force-all -i *.deb
         echo "KVER=$(echo $ALL_DEB | cut -d '_' -f 2 | rev | cut -c14- | rev)-generic" >> $GITHUB_ENV
     - name: apt-linux-headers