Updated Node 20 version to safe version (#5118)

The current Node version: Node 20.17.0 has a security issue: https://www.tenable.com/plugins/nessus/214404

Co-authored-by: shwkumar <[email protected]>

Author: tarunramsinghani

src/Misc/externals.sh

@@ -26,7 +26,7 @@ NODE_VERSION="6.17.1"
 NODE10_VERSION="10.24.1"
 NODE16_VERSION="16.20.2"
 NODE16_WIN_ARM64_VERSION="16.9.1"
-NODE20_VERSION="20.17.0"
+NODE20_VERSION="20.18.2"
 MINGIT_VERSION="2.47.0.2"
 LFS_VERSION="3.4.0"