Doc: Replace the deprecated highlightlang directive by highlight. (python/cpython#13377)

matrixise · erlend-aasland · commit 244f0be41356 · 2023-09-26T09:42:01.000+02:00
highlightlang is deprecated since April 2018 in Sphinx. See sphinx-doc/sphinx#4845
diff --git a/Doc/howto/clinic.rst b/Doc/howto/clinic.rst
@@ -1,4 +1,4 @@
-.. highlightlang:: c
+.. highlight:: c
 
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 Argument Clinic How-To
