chore: update .env.example with sentiment filter config

.env.sample

@@ -44,5 +44,10 @@ DEFAULT_FILTER_HATE_SPEECH_TOXIC_CONFIDENCE=75
 # (Default: max, Options: max, sum) Methods to determine toxic content by using max value from all toxic classes score or sum value of all toxic classes score
 DEFAULT_FILTER_HATE_SPEECH_TOXIC_EVALUATION_MODE=max
 
+# (Default: all, Multiple Options: all,negative,neutral,positive) Multiple options separated by comma (eg: neutral,positive => filter to get both neutral and positive sentiment)
+DEFAULT_FILTER_SENTIMENT_MODE=all
+# (Default: 35, Options: 0-100) Default minimum probability/confidence score in percentage to determine the classification of sentiment
+DEFAULT_FILTER_SENTIMENT_CONFIDENCE=35
+
 # (Default: all, Options: all, nostr, activitypub) Filter user type. "nostr" for native nostr users and "activitypub" for activitypub users coming from bridge
 DEFAULT_FILTER_USER_MODE=all