Remove in-place sed command (#115)

Author: Sean Sundberg

.github/scripts/update-modules.sh

@@ -28,7 +28,9 @@ ls "${REPO_DIR}"/terraform/stages/*.tf | while read stageFile; do
       latest_source=$(echo "${source}" | sed -E "s/(.*)=.*/\1=${latest_release}/g")
 
       echo "  ++ Latest source for ${git_slug} is ${latest_source}"
-      sed -i "" -e "s~${source}~${latest_source}~g" "${stageFile}"
+      sed "s~${source}~${latest_source}~g" "${stageFile}" > "${stageFile}.tmp" && \
+        rm "${stageFile}" && \
+        mv "${stageFile}.tmp" "${stageFile}"
     else
       echo "  ** Release not found for ${git_release_url}"
     fi