Update javascript/ql/src/Security/CWE-770/ResourceExhaustion.qhelp

Co-authored-by: mc <[email protected]>

Author: esbena

javascript/ql/src/Security/CWE-770/ResourceExhaustion.qhelp

@@ -23,7 +23,7 @@
 			Ensure that attackers can not control object sizes and their
 			lifetimes. If object sizes and lifetimes must be controlled by
 			external parties, ensure you restrict the object sizes and lifetimes so that
-			be within accptable ranges.
+			they are within acceptable ranges.
 
 		</p>