minor #11336 Fix a typo for the range of allowed attack complexity score values (michaelcullum)

This PR was submitted for the master branch but it was merged into the 3.4 branch instead (closes #11336).

Discussion
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Fix a typo for the range of allowed attack complexity score values

#eufossa

Commits
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1ce2d7b Fix a typo for the range of allowed attack complexity score values

Author: wouterj

contributing/code/security.rst

@@ -150,7 +150,7 @@ score for Affected Projects is capped at 4.*
 Score Totals
 ~~~~~~~~~~~~
 
-* Attack Complexity: 1 - 4
+* Attack Complexity: 1 - 5
 * Impact: 1 - 6
 * Affected Projects: 1 - 4