Make installers lowercase.

Author: mfl28

.github/workflows/workflow.yml

@@ -225,7 +225,7 @@ jobs:
         run: |
           sudo apt-get install rename
           mv boundingboxeditor-installer-*/* .
-          find "$PWD"/* -maxdepth 0 -type f -name "BoundingBoxEditor*" -exec rename -f 'y/A-Z/a-z/' {} ";"
+          find "$PWD"/* -maxdepth 0 -type f -name "BoundingBoxEditor*" -exec basename {} ";" | rename -f 'y/A-Z/a-z/'
           find "$PWD"/* -maxdepth 0 -type d -name "boundingboxeditor-portable-*" -exec zip -r {}.zip {} ";"
       - name: Release to github
         uses: softprops/action-gh-release@v1