Changed js/node/assignment-to-exports-variable to reliability and correctness

Author: Napalys

javascript/ql/src/NodeJS/InvalidExport.ql

@@ -6,8 +6,8 @@
  * @problem.severity warning
  * @id js/node/assignment-to-exports-variable
  * @tags quality
- *       maintainability
- *       readability
+ *       reliability
+ *       correctness
  *       frameworks/node.js
  *       external/cwe/cwe-563
  * @precision very-high