src: add missing initialization

This missing initialization was reported by the coverity scans
we are in the process of re-enabling.

PR-URL: #40370
Reviewed-By: Rich Trott <rtrott@gmail.com>
Reviewed-By: Richard Lau <rlau@redhat.com>
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Luigi Pinca <luigipinca@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Darshan Sen <raisinten@gmail.com>
Reviewed-By: Gerhard Stöbich <deb2001-github@yahoo.de>

src/node_options.h

@@ -111,7 +111,7 @@ class EnvironmentOptions : public Options {
   std::string module_type;
   std::string experimental_policy;
   std::string experimental_policy_integrity;
-  bool has_policy_integrity_string;
+  bool has_policy_integrity_string = false;
   bool experimental_repl_await = true;
   bool experimental_vm_modules = false;
   bool expose_internals = false;