fix(ci): make sure poetry environment is clean of leftovers

.gitlab-ci.yml

@@ -29,7 +29,7 @@ stages:
 
 before_script:
   - . /nix/var/nix/profiles/default/etc/profile.d/nix-daemon.sh || true
-  - nix-shell --run "poetry install"
+  - nix-shell --run "poetry install --remove-untracked"
   - export LEGACY_VERSION=$(nix-shell --run "./tools/version.sh legacy/firmware/version.h")
   - export CORE_VERSION=$(nix-shell --run "./tools/version.sh core/embed/firmware/version.h")
 

docs/core/build/index.md

@@ -23,7 +23,7 @@ If you are building from an existing checkout, do not forget to refresh the subm
 
 ```sh
 git submodule update --init --recursive --force
-poetry install
+poetry install --remove-untracked
 ```
 
 ## Poetry