CI: Fix writing-tests.rst format to pass doc rstfmt CI

This fixes https://github.com/php/php-src/actions/runs/30206101130/job/89804320499?pr=22799

Author: LamentXU123

docs/source/miscellaneous/writing-tests.rst

@@ -237,8 +237,8 @@ and not in the INI section. This is because of the order in which settings are c
 
 If a TZ environmental variable is found the INI setting will be ignored.
 
-Tests that run, or only have matching EXPECT output, on 32bit platforms can use a SKIPIF
-section like:
+Tests that run, or only have matching EXPECT output, on 32bit platforms can use a SKIPIF section
+like:
 
 .. code:: php