scripted-diff: Adjust documentation per top-level target output location

-BEGIN VERIFY SCRIPT-

ren() { sed -i "s|\<$1\>|$2|g" $( git grep -l "$1" :\(exclude\)./src/secp256k1 ) ; }

ren build/src/bench   build/bin
ren build/src/test    build/bin
ren build/src/qt/test build/bin
ren build/src/qt      build/bin
ren build/src         build/bin
ren build_fuzz/src/test/fuzz build_fuzz/bin

-END VERIFY SCRIPT-

contrib/tracing/README.md

@@ -188,7 +188,7 @@ In a different terminal, starting Bitcoin Core in SigNet mode and with
 re-indexing enabled.
 
 ```
-$ ./build/src/bitcoind -signet -reindex
+$ ./build/bin/bitcoind -signet -reindex
 ```
 
 This produces the following output.