[COMMITTERS] pgsql: Update expected results for collate.linux.utf8 regression test.

Update expected results for collate.linux.utf8 regression test.

I believe this changed as a consequence of commit 54baa4813: trying to
clone the "C" collation now produces a true clone with collencoding -1,
hence the error message if it's duplicate no longer specifies an encoding.

Per buildfarm member crake, which apparently hadn't been running this
test for the last few weeks.

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/991c8b04fc5d61a308bb00ea34a7ff710051c53f

Modified Files
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src/test/regress/expected/collate.linux.utf8.out | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)