Fix jq path

.github/workflows/release_prep_test.sh

diff --git a/.github/workflows/release_prep_test.sh b/.github/workflows/release_prep_test.sh
index e3a39f4..d9f24e4 100755
--- a/.github/workflows/release_prep_test.sh
+++ b/.github/workflows/release_prep_test.sh
@@ -63,7 +63,7 @@
 ##############################
 # Fixture: put jq (from Bazel toolchain) on the PATH
 ##############################
-ln -sf "$JQ_BIN" "$TEST_DIR/.mock_bin/jq"
+ln -sf "$(rlocation ${JQ_BIN#"external/"})" "$TEST_DIR/.mock_bin/jq"
 
 ##############################
 # Fixture: mock curl returning a GitHub Releases API response