update comment

Author: jaydeluca

buildscripts/checkstyle.xml

@@ -51,7 +51,7 @@
 
   <module name="TreeWalker">
     <!-- Enforce static imports for OpenTelemetryAssertions methods (lowercase), but allow inner
-    classes (uppercase). The negative lookup is needed so we don't match import lines. -->
+    classes (uppercase). The negative lookahead is needed so we don't match import lines. -->
     <module name="RegexpSinglelineJava">
       <property name="format"
                 value="^(?!.*import).*OpenTelemetryAssertions\.[a-z]"/>