pgsql: Adjust to latest Msys2 kernel release number

Adjust to latest Msys2 kernel release number

Previously 'uname -r' on Msys2 reported a kernele release starting with
2. The latest version starts with 3. In commit 1638623f we specifically
looked for one starting with 2. This is now changed to look for any
digit between 2 and 9.

backpatch to release 10.

Branch
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master

Details
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https://git.postgresql.org/pg/commitdiff/c62b84437f52f0e23924268938916e90b8e5b9e6

Modified Files
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src/bin/pg_dump/t/010_dump_connstr.pl | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)