DOCS-1022 - Update filters list for the hasThreatMatch function (#5618)

* Update filters list

* Change 'threatType' to 'threat_type'

---------

Co-authored-by: Kim (Sumo Logic) <[email protected]>

Author: jpipkin1

docs/cse/rules/cse-rules-syntax.md

@@ -645,16 +645,11 @@ When an entity is processed by a rule using the `hasThreatMatch` function and is
 Parameters:
 * **`<fields>`**. A list of comma-separated [field names](https://github.com/SumoLogic/cloud-siem-content-catalog/blob/master/schema/full_schema.md). At least one field name is required.
 * **`<filters>`**. A logical expression using [indicator attributes](/docs/security/threat-intelligence/upload-formats/#normalized-json-format). Allowed in the filtering are parentheses `()`; `OR` and `AND` boolean operators; and comparison operators `=`, `<`, `>`, `=<`, `>=`, `!=`. <br/>You can filter on the following indicator attributes:
-   * `actors`. An identified threat actor such as an individual, organization, or group. 
    * `confidence` Confidence that the data represents a valid threat, where 100 is highest.  Malicious confidence scores from different sources are normalized and mapped to a 0-100 numerical value.
-   * `id`. ID of the indicator.
    * `indicator`. Value of the indicator, such as an IP address, file name, email address, etc. 
-   * `killChain`. The various phases an attacker may undertake to achieve their objectives (for example, `reconnaissance`, `weaponization`, `delivery`, `exploitation`, `installation`, `command-and-control`, `actions-on-objectives`).
    * `source`. The source in the Sumo Logic datastore displayed in the **Threat Intelligence** tab.
-   * `threatType`. The threat type of the indicator (for example, `anomalous-activity`, `anonymization`, `benign`, `compromised`, `malicious-activity`, `attribution`, `unknown`).
+   * `threat_type`. The threat type of the indicator (for example, `anomalous-activity`, `anonymization`, `benign`, `compromised`, `malicious-activity`, `attribution`, `unknown`).
    * `type`. The indicator type (for example, `ipv4-addr`, `domain-name`, `'file:hashes`, etc.)
-   * `validFrom`. Beginning time this indicator is valid.
-   * `validUntil`. Ending time this indicator is valid. 
 * **`<indicators>`**. An optional case insensitive option that describes how indicators should be matched with regard to their validity. Accepted values are:
    * `active_indicators`. Match active indicators only (default).
    * `expired_indicators`. Match expired indicators only.