Fix test expectations for optional lane parameter

Update expected output to reflect that when the lane parameter is not
provided to get_illumina_run_metadata, illumina.py returns "lane": "0"
instead of "lane": "1".

This fixes the CI failure introduced by making the lane parameter
optional in commit 9f047f8.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: dpark01

test/input/WDL/test_outputs-load_illumina_fastqs-local.json

@@ -2,7 +2,7 @@
   "load_illumina_fastqs.run_info": {
     "flowcell": "TESTFC01",
     "indexes": "2",
-    "lane": "1",
+    "lane": "0",
     "lane_count": "1",
     "read_structure": "50T8B8B50T",
     "run_id": "250101_TEST_0001_BTESTFC01",