[Doc][Clang] Update information about default standard version

clang/www/cxx_status.html

@@ -498,8 +498,7 @@ <h2 id="cxx14">C++14 implementation status</h2>
     href="https://www.iso.org/standard/64029.html">ISO
     C++ 2014 standard</a>.</p>
 
-<p>By default, Clang builds C++ code according to the C++14 standard.
-You can use Clang in C++14 mode with the <code>-std=c++14</code> option
+<p>You can use Clang in C++14 mode with the <code>-std=c++14</code> option
 (use <code>-std=c++1y</code> in Clang 3.4 and earlier).</p>
 
 <details>
@@ -593,7 +592,8 @@ <h2 id="cxx17">C++17 implementation status</h2>
 <p>Clang 5 and later implement all the features of the
 <a href="https://www.iso.org/standard/68564.html">ISO C++ 2017 standard</a>.</p>
 
-<p>You can use Clang in C++17 mode with the <code>-std=c++17</code> option
+<p>By default, Clang 16 or later builds C++ code according to the C++17 standard.
+You can use Clang in C++17 mode with the <code>-std=c++17</code> option
 (use <code>-std=c++1z</code> in Clang 4 and earlier).</p>
 
 <details open>