Bump @actions/core to 1.9.1 (#56)

Fixes CVE-2022-35954. Does not look like anything terriblity important
to me, but hey, audit is happy.

node_modules/uuid/dist/esm-node/validate.js

@@ -0,0 +1,7 @@
+import REGEX from './regex.js';
+
+function validate(uuid) {
+  return typeof uuid === 'string' && REGEX.test(uuid);
+}
+
+export default validate;