chore: upgrade ngx_multi_upstream_module to fix compile error (#425)

Author: bzp2010

build-apisix-runtime.sh

@@ -22,7 +22,7 @@ ld_opt=${ld_opt:-"-L$zlib_prefix/lib -L$pcre_prefix/lib -L$OPENSSL_PREFIX/lib -W
 # dependencies for building openresty
 OPENSSL_VERSION=${OPENSSL_VERSION:-"3.2.0"}
 OPENRESTY_VERSION="1.27.1.1"
-ngx_multi_upstream_module_ver="1.3.1"
+ngx_multi_upstream_module_ver="1.3.2"
 mod_dubbo_ver="1.0.2"
 apisix_nginx_module_ver="1.18.0"
 wasm_nginx_module_ver="0.7.0"