update setup version

Author: nreimers

setup.py

@@ -15,7 +15,7 @@
     long_description_content_type="text/markdown",
     license="Apache License 2.0",
     url="https://github.com/UKPLab/sentence-transformers",
-    download_url="https://github.com/UKPLab/sentence-transformers/archive/v2.2.0.zip",
+    download_url="https://github.com/UKPLab/sentence-transformers/archive/v2.2.1.zip",
     packages=find_packages(),
     install_requires=[
         'transformers>=4.6.0,<5.0.0',