Help: Fix command references in CTEST_CUSTOM_ variables

Fixes: #19087

Help/variable/CTEST_CUSTOM_ERROR_EXCEPTION.rst

@@ -2,6 +2,6 @@ CTEST_CUSTOM_ERROR_EXCEPTION
 ----------------------------
 
 A list of regular expressions which will be used to exclude when detecting
-error messages in build outputs by the :command:`ctest_test` command.
+error messages in build outputs by the :command:`ctest_build` command.
 
 .. include:: CTEST_CUSTOM_XXX.txt

Help/variable/CTEST_CUSTOM_ERROR_MATCH.rst

@@ -2,6 +2,6 @@ CTEST_CUSTOM_ERROR_MATCH
 ------------------------
 
 A list of regular expressions which will be used to detect error messages in
-build outputs by the :command:`ctest_test` command.
+build outputs by the :command:`ctest_build` command.
 
 .. include:: CTEST_CUSTOM_XXX.txt

Help/variable/CTEST_CUSTOM_ERROR_POST_CONTEXT.rst

@@ -2,6 +2,6 @@ CTEST_CUSTOM_ERROR_POST_CONTEXT
 -------------------------------
 
 The number of lines to include as context which follow an error message by the
-:command:`ctest_test` command. The default is 10.
+:command:`ctest_build` command. The default is 10.
 
 .. include:: CTEST_CUSTOM_XXX.txt

Help/variable/CTEST_CUSTOM_ERROR_PRE_CONTEXT.rst

@@ -2,6 +2,6 @@ CTEST_CUSTOM_ERROR_PRE_CONTEXT
 ------------------------------
 
 The number of lines to include as context which precede an error message by
-the :command:`ctest_test` command. The default is 10.
+the :command:`ctest_build` command. The default is 10.
 
 .. include:: CTEST_CUSTOM_XXX.txt