chore(frontend): ic-mgmt dev dependency script (#4056)

# Motivation

Adapt the lib update script to handle the fact that ic-mgmt is a dev
dependency.

scripts/update-agent.sh

@@ -1,9 +1,9 @@
 #!/usr/bin/env bash
 
-npm rm @dfinity/agent @dfinity/auth-client @dfinity/candid @dfinity/principal @dfinity/ckbtc @dfinity/cketh @dfinity/ic-management @dfinity/ledger-icp @dfinity/ledger-icrc @dfinity/utils
+npm rm @dfinity/agent @dfinity/auth-client @dfinity/candid @dfinity/principal @dfinity/ckbtc @dfinity/cketh @dfinity/ledger-icp @dfinity/ledger-icrc @dfinity/utils
 
-npm rm @dfinity/identity-secp256k1 -D
+npm rm @dfinity/identity-secp256k1 @dfinity/ic-management -D
 
-npm i @dfinity/[email protected] @dfinity/[email protected] @dfinity/[email protected] @dfinity/[email protected] @dfinity/ckbtc@latest @dfinity/cketh@latest @dfinity/ic-management@latest @dfinity/ledger-icp@latest @dfinity/ledger-icrc@latest @dfinity/utils@latest
+npm i @dfinity/[email protected] @dfinity/[email protected] @dfinity/[email protected] @dfinity/[email protected] @dfinity/ckbtc@latest @dfinity/cketh@latest @dfinity/ledger-icp@latest @dfinity/ledger-icrc@latest @dfinity/utils@latest
 
-npm i @dfinity/[email protected] -D
+npm i @dfinity/[email protected] @dfinity/ic-management@latest -D