docs: refresh the termlens skill copy for the 0.9 drag signature

[vyncint]

The bundled copy of the termlens skill described an API that no longer exists.

-`drag(button, (col, row), (col, row))`. Never
- pass a `find` result straight into `drag` — the tuple types match and
- the axes do not.
+`drag(button, from_col, from_row, to_col,
+ to_row)`. The four drag arguments make a transposed `find` result
+ unwritable without explicitly choosing the coordinate order.

termlens 0.9 takes five flat arguments:

pub fn drag(&mut self, button: impl Into<MouseChord>,
            from_col: u16, from_row: u16, to_col: u16, to_row: u16) -> Result<()>

So the stale text was wrong twice over: it gave a call shape that does not
compile, and it warned about a footgun (the tuple types match and the axes do not) that the new signature exists to eliminate.

Taken verbatim from termlens/skills/termlens/SKILL.md, the source of truth,
which was already correct. Verified against the real 0.9.0 signatures rather
than trusted: Screen::find returns (row, col), while click, click_with,
scroll and resize are all column-first.

Found while installing the skill into oxmera and diffing against the canonical.
All three repositories that bundle it — mossaic, launchbound, reconverge — had
byte-identical stale copies; this is one of three identical PRs.

No behaviour change: this file is agent guidance, not code.