MANUAL: Fixed spelling of classifying

Author: chaitanyamogal

doc/MANUAL.md

@@ -161,7 +161,7 @@ information on possible workarounds and patches that could be backported to
 other versions.  Note that neither workarounds nor backported fixes can be
 detected by this tool, so your binary will continue to show up as vulnerable
 even though it may now be safely mitigated and result in a false positive.
-To avoid this problem, we recommend classifing CVE as Mitigated as explained
+To avoid this problem, we recommend classifying CVE as Mitigated as explained
 in the Input section.
 
 ## Limitations