cobol: One additional edit to testsuite/cobol.dg/group1/check_88.cob [PR120251]

Missed one edit.  This fixes that.

gcc/testsuite/ChangeLog:

	PR cobol/120251
	* cobol.dg/group1/check_88.cob: One final regex "." instead of "ß"

(cherry picked from commit fae53928595341981f08ded4edcbba07ee1d5d04)
1 file changed