Add missing DEB build dependencies

- ninja-build: required by dpkg-buildpackage
- libboost-all-dev: required by dpkg-checkbuilddeps
- libjson-glib-dev: required by dpkg-checkbuilddeps
- libgeographic-dev: required by dpkg-checkbuilddeps

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

qt6-after/qt6-migrated-legatus/new_docker_build.sh

@@ -271,6 +271,10 @@ APT_PACKAGES=(
   build-essential
   cmake
   libboost-dev
+  libboost-all-dev
+  libjson-glib-dev
+  libgeographic-dev
+  ninja-build
   libkf6texttemplate-dev
   libpoppler-dev
   libpoppler-qt6-dev