fix(internal/kokoro): remove extra dash in doc tarball
Before, this would be uploaded as `docfx--go-...`.
@@ -43,6 +43,6 @@ cd obj/api || exit 4
python3 -m docuploader upload \
--staging-bucket docs-staging-v2-staging \
- --destination-prefix docfx- \
+ --destination-prefix docfx \
--credentials "$KOKORO_KEYSTORE_DIR/73713_docuploader_service_account" \
.
