Missing word in DEVELOPMENT instructions is confusing to a new developer (Failed to spawn: `ui-compile`)

DEVELOPMENT.md has an incorrect `uv` invocation listed:

> * `uv run ui-compile` - compile Qt resources. Should be executed before first `uv run NanoVNASaver` run

That is missing `task`; it should be `uv run task ui-compile`

As it is, it tries to find and run a binary called `ui-compile` and fails to find it. (I went on a bit of a hunt for such a binary before realizing what was needed. ☺)