Fix incorrect CWE tags

Author: owen-mc

python/ql/src/Expressions/UseofInput.ql

@@ -4,8 +4,8 @@
  * @kind problem
  * @tags security
  *       correctness
- *       security/cwe/cwe-94
- *       security/cwe/cwe-95
+ *       external/cwe/cwe-094
+ *       external/cwe/cwe-095
  * @problem.severity error
  * @security-severity 9.8
  * @sub-severity high