docs: change telescope fzf native to lazy syntax (nvim-lua#185)

Author: folke

README.md

@@ -125,6 +125,6 @@ This requires:
 - Install CMake, and the Microsoft C++ Build Tools on Windows
 
 ```lua
-use {'nvim-telescope/telescope-fzf-native.nvim', run = 'cmake -S. -Bbuild -DCMAKE_BUILD_TYPE=Release && cmake --build build --config Release && cmake --install build --prefix build' }
+{'nvim-telescope/telescope-fzf-native.nvim', build = 'cmake -S. -Bbuild -DCMAKE_BUILD_TYPE=Release && cmake --build build --config Release && cmake --install build --prefix build' }
 ```