Add a doc ignore for EllipsisType #2092

Job	Run time
Examples Conda Py3	1m 33s
Ruff	9s
Typos	7s
basedpyright	1m 39s
Pytest Conda Py3 Intel	2m 23s
Documentation	2m 4s
Pytest Conda Py3 POCL	2m 30s
Tests for downstream project mirgecom	5s
Tests for downstream project meshmode	11m 3s
Tests for downstream project mirgecom_examples	5s
Tests for downstream project grudge	11m 53s
	33m 31s

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