ignore *~ files in the po directory (#3453)

Common IME for `gettext` utilities like `tools::update_pkg_po('.')` to create these temp files (at least on Mac)
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Michael Chirico 2020-07-04 04:19:48 +08:00 committed by GitHub
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@ -40,3 +40,6 @@ vignettes/*.pdf
# pkgdown site
docs/
# translation temp files
po/*~