ghostfolio: refactor CoinGecko key prompts in installer (#8935)

Updated CoinGecko API configuration messages for clarity.

Author: MickLesk

install/ghostfolio-install.sh

@@ -60,11 +60,10 @@ $STD npm ci
 $STD npm run build:production
 msg_ok "Built Ghostfolio"
 
-msg_ok "Optional CoinGecko API Configuration"
-echo
-echo -e "${YW}CoinGecko API keys are optional but provide better cryptocurrency data.${CL}"
-echo -e "${YW}You can skip this and add them later by editing /opt/ghostfolio/.env${CL}"
-echo
+echo -e ""
+msg_custom "🪙" "$YW" "CoinGecko API keys are optional but provide better cryptocurrency data."
+msg_custom "🪙" "$YW" "You can skip this and add them later by editing /opt/ghostfolio/.env"
+echo -e ""
 read -rp "${TAB3}CoinGecko Demo API key (press Enter to skip): " COINGECKO_DEMO_KEY
 read -rp "${TAB3}CoinGecko Pro API key (press Enter to skip): " COINGECKO_PRO_KEY