doc: Adjust path in comment

It was overlooked in bitcoin/bitcoin#31161.

Author: hebasto

src/test/fuzz/script_assets_test_minimizer.cpp

@@ -35,7 +35,7 @@ using util::SplitString;
 //
 // (libFuzzer build)
 // $ mkdir dump-min
-// $ FUZZ=script_assets_test_minimizer ./src/test/fuzz/fuzz -merge=1 -use_value_profile=1 dump-min/ dump/
+// $ FUZZ=script_assets_test_minimizer ./bin/fuzz -merge=1 -use_value_profile=1 dump-min/ dump/
 // $ (echo -en '[\n'; cat dump-min/* | head -c -2; echo -en '\n]') >script_assets_test.json
 
 namespace {