julia

ec272746 - Update the developer docs to reflect the use of JuliaSyntax.jl (#59300)

Update the developer docs to reflect the use of JuliaSyntax.jl (#59300) [The "parsing" section of the "eval" dev docs page](https://docs.julialang.org/en/v1/devdocs/eval/#dev-parsing) was not updated when JuliaSyntax.jl was adopted in 1.10. This updates the text to reflect that it is the default parser and briefly mentions how to switch back.