Support float queryValue for MongoDB scaler (#1553)

Signed-off-by: rickbrouwer <[email protected]>

Author: rickbrouwer

content/docs/2.17/scalers/mongodb.md

@@ -64,8 +64,8 @@ The `mongodb` trigger always requires the following information:
 - `dbName` - Name of the database.
 - `collection` - Name of the collection.
 - `query` - A MongoDB query that should return single numeric value.
-- `queryValue` - A threshold that will define when scaling should occur.
-- `activationQueryValue` - Target value for activating the scaler. Learn more about activation [here](./../concepts/scaling-deployments.md#activating-and-scaling-thresholds). (Default: `0`, Optional)
+- `queryValue` - A threshold that will define when scaling should occur. This value can be a float.
+- `activationQueryValue` - Target value for activating the scaler. Learn more about activation [here](./../concepts/scaling-deployments.md#activating-and-scaling-thresholds). (Default: `0`, Optional). This value can be a float.
 
 To connect to the MongoDB server, you can provide either: