v0.16.4

Fixes

• Fix ValueError in Guided Topic Modeling by @RTChou in #2115
• Fix saving BERTopic when c-TF-IDF is None by @sete39 in #2112
• Fix KeyError: 'topics_from' in #2101
• Fix issues related Zero-shot Topic Modeling by @ianrandman in #2105
• Fix regex matching being used in PartOfSpeech representation model by @woranov in #2138
• Update typo by @saikumaru in #2162