CI: skip apt upgrade on github runners (#13975)

Revert: https://github.com/vim/vim/pull/13680
Fixed in: https://github.com/actions/runner-images/issues/9016

Signed-off-by: Philip H <47042125+pheiduck@users.noreply.github.com>
Signed-off-by: Christian Brabandt <cb@256bit.org>
diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 49c9d3f..0d34658 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -124,7 +124,7 @@
               libattr1-dev
             )
           fi
-          sudo apt-get update && sudo apt-get upgrade && sudo apt-get install -y "${PKGS[@]}"
+          sudo apt-get update && sudo apt-get install -y "${PKGS[@]}"
 
       - name: Install gcc-${{ env.GCC_VER }}
         if:  matrix.compiler == 'gcc'