Update SpelInjection.qhelp

Author: mchammer01

java/ql/src/Security/CWE/CWE-094/SpelInjection.qhelp

@@ -4,7 +4,7 @@
 <overview>
 <p>
 The Spring Expression Language (SpEL) is a powerful expression language
-provided by Spring Framework. The language offers many features
+provided by the Spring Framework. The language offers many features
 including invocation of methods available in the JVM.
 If a SpEL expression is built using attacker-controlled data, 
 and then evaluated in a powerful context,
@@ -31,7 +31,7 @@ that doesn't allow arbitrary method invocation.
 <example>
 <p>
 The following example uses untrusted data to build a SpEL expression
-and then runs it in the default powerfull context.
+and then runs it in the default powerful context.
 </p>
 <sample src="UnsafeSpelExpressionEvaluation.java" />
 
@@ -53,4 +53,4 @@ However, it's recommended to avoid using untrusted input in SpEL expressions.
   <a href="https://owasp.org/www-community/vulnerabilities/Expression_Language_Injection">Expression Language Injection</a>.
 </li>
 </references>
-</qhelp>
+</qhelp>