adjust parsing message from "warn" to "debug" level

alfa-client/libs/tech-shared/src/lib/tech.util.ts

@@ -135,7 +135,7 @@ export function convertToBoolean(booleanStr: string): boolean {
   try {
     return JSON.parse(booleanStr.toLowerCase());
   } catch (e: unknown) {
-    console.warn('Error parsing ' + booleanStr + ' to boolean value.', e);
+    console.debug('Error parsing ' + booleanStr + ' to boolean value.', e);
     return undefined;
   }
 }