[Release] `dev/release/release.sh` will be failed with `svn add`

[kou]

Describe the bug, including details regarding any error messages, version, and platform.

See also: apache/arrow-go#249 (comment)

svn: warning: W150002: '/tmp/arrow-go/dev/release/dist' is already under version control
svn: E200009: Could not add all targets because some targets are already versioned
svn: E200009: Illegal target for the requested operation