Reword explanation of Update + Pop

content/blog/06_compiler_compilation.md

@@ -408,10 +408,10 @@ looks as follows for `definition_defn`:
 
 {{< codelines "C++" "compiler/06/definition.cpp" 44 52 >}}
 
-Notice that we terminate the function with Update and Pop. This
+Notice that we terminate the function with Update and Pop. Update
 will turn the `ast_app` node that served as the "root"
 of the application into an indirection to the value that we have computed.
-Doing so will also remove all "scratch work" from the stack.
+After this, Pop will remove all "scratch work" from the stack.
 In essense, this is how we can lazily evaluate expressions.
 
 Finally, we make a function in our `main.cpp` file to compile