deps: ignore deps/.cipd fetched by deps/v8/tools/node/fetch_deps.py

This may show up when building and running v8 tests locally
with tools/make-v8.sh

PR-URL: https://github.com/nodejs/node/pull/28095


Reviewed-By: Richard Lau <riclau@uk.ibm.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Refael Ackermann (רפאל פלחי) <refack@gmail.com>