Update military.md

The United Kingdom should take a role as international leader in pursuit of global nuclear disarmament, beginning with a promise to discontinue its own existing nuclear arsenal following any reforms of its conventional forces necessary for the United Kingdom to meet its security needs and international obligations. The United Kingdom should be resolutely opposed to horizontal and vertical nuclear proliferation in all forms and lead by example in pursuit of a world free of nuclear warheads and delivery mechanisms.
Merge pull request #186 from Proxenia/patch-1

Update military.md