Merge pull request github#19312 from igfoo/igfoo/fix-typo-unmasked-secret-exposure

actions: Fix spelling error in UnmaskedSecretExposure.md

Author: igfoo

actions/ql/src/Security/CWE-312/UnmaskedSecretExposure.md

@@ -2,7 +2,7 @@
 
 ## Description
 
-Secrets derived from other secrets are not know to the workflow runner and therefore not masked unless explicitly registered.
+Secrets derived from other secrets are not known to the workflow runner and therefore not masked unless explicitly registered.
 
 ## Recommendations