v2.2.1 - Update huggingface_hub & fixes

Version 0.8.1 of huggingface_hub introduces several changes that resulted in errors and warnings. This version of sentence-transformers fixes these issues.

Further, several improvements have been added / merged:

• util.community_detection was improved: 1) It works in a batched mode to save memory, 2) Overlapping clusters are no longer dropped but removed by overlapping items, 3) The parameter init_max_size was removed and replaced by a heuristic to estimate the max size of clusters
• #1581 the training dataset names can be saved in the model card
• #1426 fix the text summarization example
• #1487 Rekursive sentence-transformers models are now possible
• #1522 Private models can now be loaded
• #1551 DataLoaders can now have workers
• #1565 Models are just checked on the hub if they don't exist in the cache. Fixes issues with connectivity issues
• #1591 Example added how to stream encode larger datasets