Correct documentation for the hasBody() AST matcher; NFC

Note, when regenerating the documentation for this change, no changes
were made to the HTML file. There is an existing bug with the AST
matcher python script that fails to handle hasBody() specifically. So
this commit is to correct the internal documentation but another change
will be needed to fix the public documentation.

clang/include/clang/ASTMatchers/ASTMatchers.h

@@ -5468,7 +5468,7 @@ AST_MATCHER_P(ArraySubscriptExpr, hasBase,
 /// \code
 ///   for (;;) {}
 /// \endcode
-/// hasBody(compoundStmt())
+/// forStmt(hasBody(compoundStmt()))
 ///   matches 'for (;;) {}'
 /// with compoundStmt()
 ///   matching '{}'
@@ -5478,7 +5478,7 @@ AST_MATCHER_P(ArraySubscriptExpr, hasBase,
 ///   void f();
 ///   void f() {}
 /// \endcode
-/// hasBody(functionDecl())
+/// functionDecl(hasBody(compoundStmt()))
 ///   matches 'void f() {}'
 /// with compoundStmt()
 ///   matching '{}'