ARROW-14402: [Release][Yum] Specify gpg path explicitly
ARROW-14402: [Release][Yum] Specify gpg path explicitly

The default gpg path is /usr/bin/gpg2 but it doesn't exist. We should
use /usr/bin/gpg.

Closes #11492 from kou/release-binary-upload-rpm-gpg-path

Authored-by: Sutou Kouhei <73218711cdd5d5c30ac66da3cc4d9d9204caf34b@clear-code.com>
Signed-off-by: Krisztián Szűcs <6bab32dc957a05a87930e779f272342e159326fa@gmail.com>

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