build: track PDL files as inputs in inspector GN build

The `node_protocol_generated_sources` action
was missing `gypi_values.node_pdl_files` from its inputs, causing Ninja
to skip regeneration when PDL domain files changed.

PR-URL: #62888
Reviewed-By: Chengzhong Wu <[email protected]>
Reviewed-By: Anna Henningsen <[email protected]>
Reviewed-By: Kohei Ueno <[email protected]>

Author: deepak1556

src/inspector/unofficial.gni

@@ -29,7 +29,7 @@ template("inspector_gn_build") {
     deps = [ ":node_protocol_json" ]
 
     outputs = gypi_values.node_inspector_generated_sources
-    inputs = gypi_values.node_protocol_files + [
+    inputs = gypi_values.node_protocol_files + gypi_values.node_pdl_files + [
       "node_protocol_config.json",
       "$node_gen_dir/src/node_protocol.json",
     ]