Small fixes for Java and Flutter.

tasks/workstation/linux/software/flutter.yml

@@ -133,7 +133,7 @@
   ansible.builtin.blockinfile:
     path: "{{ user_user.home }}/{{ item }}"
     block: |
-      export FLUTTER_HOME="{{ flutter_sdk }}"
+      export FLUTTER_HOME="{{ flutter_home }}"
       export PATH="{{ flutter_bin }}:$PATH"
     marker: '# {mark} MANAGED BY ANSIBLE | Flutter'
     state: present