fix(typos)

src/render.zig

@@ -7,7 +7,7 @@
 //! - render(this: *@This(), size: Size, contents: []u8) !void {}
 //! - flush(this: @This()) !void {}
 //!
-//! Each `Renderer` should be able to be used interchangable without having to
+//! Each `Renderer` should be able to be used interchangeable without having to
 //! change any code of any `Layout` or `Widget`. The only change should be the
 //! passed type to `zterm.App` _R_ parameter.
 const std = @import("std");