Buffer: Convert Line Endings (LF/CRLF)…
buffer.convertLineEndings Convert the file's line endings between LF and CRLF.
How to run it
Open the command palette (M-x in the Emacs keymap) and search for Buffer: Convert Line Endings (LF/CRLF)…, then press Enter. It has no default keybinding, but you can bind one in Settings → Keymaps.