drone-ci image name fix, use -builder images

.drone.jsonnet

@@ -393,11 +393,11 @@ local docs_pipeline(name, image, extra_cmds=[], allow_fail=false) = {
                   cmake_extra='-DWITH_HIVE=ON'),
 
   // Deb builds:
-  deb_builder(docker_base + 'debian-sid-debhelper', 'sid', 'debian/sid'),
-  deb_builder(docker_base + 'debian-bullseye-debhelper', 'bullseye', 'debian/bullseye'),
-  deb_builder(docker_base + 'ubuntu-impish-debhelper', 'impish', 'ubuntu/impish'),
-  deb_builder(docker_base + 'ubuntu-focal-debhelper', 'focal', 'ubuntu/focal'),
-  deb_builder(docker_base + 'debian-sid-debhelper', 'sid', 'debian/sid', arch='arm64'),
+  deb_builder(docker_base + 'debian-sid-builder', 'sid', 'debian/sid'),
+  deb_builder(docker_base + 'debian-bullseye-builder', 'bullseye', 'debian/bullseye'),
+  deb_builder(docker_base + 'ubuntu-impish-builder', 'impish', 'ubuntu/impish'),
+  deb_builder(docker_base + 'ubuntu-focal-builder', 'focal', 'ubuntu/focal'),
+  deb_builder(docker_base + 'debian-sid-builder', 'sid', 'debian/sid', arch='arm64'),
 
   // Macos builds:
   mac_builder('macOS (Release)'),