Rename untrusted checkout queries

Author: Alvaro Muñoz

ql/src/Security/CWE-829/UntrustedCheckoutError.ql renamed to ql/src/Security/CWE-829/PrivilegedUntrustedCheckoutCritical.ql

@@ -7,7 +7,7 @@
  * @problem.severity error
  * @precision high
  * @security-severity 9.3
- * @id actions/untrusted-checkout
+ * @id actions/privileged-untrusted-checkout/critical
  * @tags actions
  *       security
  *       external/cwe/cwe-829

ql/src/Security/CWE-829/UntrustedCheckoutWarning.ql renamed to ql/src/Security/CWE-829/PrivilegedUntrustedCheckoutHigh.ql

@@ -7,7 +7,7 @@
  * @problem.severity warning
  * @precision medium
  * @security-severity 5.3
- * @id actions/untrusted-checkout
+ * @id actions/privileged-untrusted-checkout/high
  * @tags actions
  *       security
  *       external/cwe/cwe-829