Backslashes in search string make the search fail

[bronger]

Searching for \.org (search type: string) does not produce any hits, whereas ripgrep on the command line yields:

bronger@wolowitz:~$ rg -F '\.org' ~/src/totorio/
/home/bronger/src/totorio/kubernetes/juliabase-website/service.yaml
8:    external-ports: '{"443": ["juliabase\.org", "www.juliabase.org"]}'

Output of deadgrep-debug:

About your environment:
Platform: gnu/linux
Emacs version: 27.0.50
Command: nil
default-directory: "~/src/totorio/"

Initial output from ripgrep:
nil

Please file bugs at https://github.com/Wilfred/deadgrep/issues/new

I use ripgrep 0.10.0.