forgot to update INSTALLBUILDER_PATH

Author: umbynos

.github/workflows/release.yml

@@ -231,7 +231,7 @@ jobs:
 
     env:
       # vars used by installbuilder
-      INSTALLBUILDER_PATH: "/opt/installbuilder-20.9.0/bin/builder"
+      INSTALLBUILDER_PATH: "/opt/installbuilder-21.3.0/bin/builder"
       INSTALLER_VARS: "project.outputDirectory=$PWD project.version=${GITHUB_REF##*/} workspace=$PWD realname=Arduino_Create_Agent"
       # vars passed to installbuilder to install https certs automatically
       CERT_INSTALL: "ask_certificates_install=CI"  # win(edge),mac(safari)