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: #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>

.gitignore

@@ -122,6 +122,8 @@ _UpgradeReport_Files/
 /deps/uv/.github/
 /deps/uv/docs/code/
 /deps/uv/docs/src/guide/
+# Ignore dependencies fetched by deps/v8/tools/node/fetch_deps.py
+/deps/.cipd
 
 # === Global Rules ===
 # Keep last to avoid being excluded