Fix typo

Author: timvaillancourt

script/build-deploy-tarball

@@ -30,7 +30,7 @@ cp ${tarball}.gz "$BUILD_ARTIFACT_DIR"/gh-ost/
 
 ### HACK HACK HACK HACK ###
 # blame @carlosmn, @mattr and @timvaillancourt-
-# Allow builds on buster to also be used for streth + jessie
+# Allow builds on buster to also be used for stretch + jessie
 stretch_tarball_name=$(echo $(basename "${tarball}") | sed s/-buster-/-stretch-/)
 jessie_tarball_name=$(echo $(basename "${stretch_tarball_name}") | sed s/-stretch-/-jessie-/)
 cp ${tarball}.gz "$BUILD_ARTIFACT_DIR/gh-ost/${stretch_tarball_name}.gz"