ci: zephyr: fix Linux/Windows artifact comparison

Preserve the complete artifact suffix when deriving Linux artifact names
from Windows artifact names.

Fixes thesofproject#11148

Signed-off-by: Piotr Hoppe <piotr.hoppe@intel.com>

Author: piotrhoppeintel

.github/workflows/zephyr.yml

@@ -512,9 +512,6 @@ jobs:
           set -x
           for windir in windows-build*; do
             lindir=linux-"${windir#windows-}"
-            diff -qr --exclude=build-sof-staging/sof-info/*/stripped-main.elf \
-            diff -qr --exclude=build-sof-staging/sof-info/*/stripped-zephyr.elf \
-            diff -qr --exclude=build-sof-staging/sof-info/*/zephyr.lst \
-            "$lindir" "$windir" || : $((diffs++))
+            diff -qr "$lindir" "$windir" || : $((diffs++))
           done
           exit $diffs