ref: fix `make install-js-dev` in getsentry (#67169)

getsentry runs this script with an alternative cwd -- ensure we always
look at the sentry requirements to bootstrap sentry-cli

<!-- Describe your PR here. -->

scripts/lib.sh

@@ -91,7 +91,7 @@ sudo-askpass() {
 }
 
 pip-install() {
-    pip install --constraint requirements-dev-frozen.txt "$@"
+    pip install --constraint "${HERE}/../requirements-dev-frozen.txt" "$@"
 }
 
 upgrade-pip() {