Update severity for excessive-secrets-exposure

This ensures that it will remain in the default suite.

Author: Dave Bartolomeo

actions/ql/src/Security/CWE-312/ExcessiveSecretsExposure.ql

@@ -2,7 +2,8 @@
  * @name Excessive Secrets Exposure
  * @description All organization and repository secrets are passed to the workflow runner.
  * @kind problem
- * @problem.severity recommendation
+ * @precision high
+ * @problem.severity warning
  * @id actions/excessive-secrets-exposure
  * @tags actions
  *       security