[pg15] test: fix pg15_tests/test_D31292.sh

Summary:
Commit 3fe5161 should have updated
test_D31292.sh.  Fix it now.

Test Plan:
On Almalinux 8:

    #!/usr/bin/env bash
    set -eu
    ./yb_build.sh fastdebug --gcc11
    pg15_tests/test_D31292.sh

Jenkins: skip

Reviewers: tfoucher, fizaa

Reviewed By: fizaa

Subscribers: yql

Differential Revision: https://phorge.dev.yugabyte.com/D35869

pg15_tests/test_D31292.sh

@@ -8,5 +8,5 @@ grep_in_java_test \
 
 failing_java_test 'TestPgRegressPgMiscIndependent'
 grep_in_java_test \
-  'failed tests: [yb_pg_dbsize, yb_pg_identity, yb_pg_index_including, yb_pg_misc, yb_pg_sequence]' \
+  'failed tests: [yb_pg_dbsize, yb_pg_identity, yb_pg_index_including, yb_pg_sequence]' \
   'TestPgRegressPgMiscIndependent'