.github/workflows/build.yml: correct paths of qemu rom

Signed-off-by: Piotr Król <piotr.krol@3mdeb.com>

Author: pietrushnic

.github/workflows/build.yml

@@ -127,7 +127,7 @@ jobs:
         with:
           name: "dasharo-${{ matrix.vendor }}-${{ matrix.model }}-${{ matrix.payload }}_${VERSION}"
           path: |
-            coreboot/build/qemu_q35_${VERSION}.rom
-            coreboot/build/qemu_q35_${VERSION}.rom.sha256
+            qemu_q35_${VERSION}.rom
+            qemu_q35_${VERSION}.rom.sha256
           retention-days: 30