Fix typo: 'rust-gdbgui' instead of 'rust-gdbui'
Fix typo: 'rust-gdbgui' instead of 'rust-gdbui'

aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,aidancully/rust,aidancully/rust,graydon/rust,aidancully/rust,graydon/rust,graydon/rust,graydon/rust,graydon/rust