Fix temp filename for debian-10 image (#5540)

test-infra/image-builder/roles/kubevirt-images/defaults/main.yml

@@ -37,7 +37,7 @@ images:
     converted: true
 
   debian-10:
-    filename: debian-9-openstack-amd64.qcow2
+    filename: debian-10-openstack-amd64.qcow2
     url: https://cdimage.debian.org/cdimage/openstack/current-10/debian-10-openstack-amd64.qcow2
     checksum: sha512:296ad8345cb49e52464a0cb8bf4365eb0b9e4220c47ebdd73d134d51effc756d5554aee15027fffd038fef4ad5fa984c94208bce60572d58b2ab26f74bb2a5de
     converted: true
@@ -52,4 +52,4 @@ images:
     filename: openSUSE-Leap-15.1-OpenStack.x86_64-0.0.4-Build6.106.qcow2
     url: https://download.opensuse.org/repositories/Cloud:/Images:/Leap_15.1/images/openSUSE-Leap-15.1-OpenStack.x86_64-0.0.4-Build6.106.qcow2
     checksum: sha256:e3c016a889505c5ae51dafe6eedc836a9e9546ab951fdc96f07eb35e34d12b8c
-    converted: true
+    converted: true