fix typos in readme
Corrected the filenames to build the one-file and one-folder package
@@ -1826,10 +1826,10 @@ pip install -r requirements.txt
pip install -r extra_dependencies.txt
# build one-folder package
-pyinstaller keeper-folder.spec
+pyinstaller keeper_folder.spec
# or build one-file package
-pyinstaller keeper-file.spec
+pyinstaller keeper_file.spec
# your packages are in dist/ folder
```
