Make it clear that the SARIF properties.security-severity property should be a string. (github#25976)

Author: chrisgavin

content/code-security/code-scanning/integrating-with-code-scanning/sarif-support-for-code-scanning.md

@@ -105,7 +105,7 @@ Any valid SARIF 2.1.0 output file can be uploaded, however, {% data variables.pr
 | `properties.tags[]` | **Optional.** An array of strings. {% data variables.product.prodname_code_scanning_capc %} uses `tags` to allow you to filter results on {% data variables.product.prodname_dotcom %}. For example, it is possible to filter to all results that have the tag `security`.
 | `properties.precision` | **Recommended.** A string that indicates how often the results indicated by this rule are true. For example, if a rule has a known high false-positive rate, the precision should be `low`. {% data variables.product.prodname_code_scanning_capc %} orders results by precision on {% data variables.product.prodname_dotcom %} so that the results with the highest `level`, and highest `precision` are shown first. Can be one of: `very-high`, `high`, `medium`, or `low`. {% ifversion fpt or ghes > 3.1 or ghae or ghec %}
 | `properties.problem.severity` | **Recommended.** A string that indicates the level of severity of any alerts generated by a non-security query. This, with the `properties.precision` property, determines whether the results are displayed by default on {% data variables.product.prodname_dotcom %} so that the results with the highest `problem.severity`, and highest `precision` are shown first. Can be one of: `error`, `warning`, or `recommendation`.
-| `properties.security-severity` | **Recommended.** A score that indicates the level of severity, between 0.0 and 10.0, for security queries (`@tags` includes `security`). This, with the `properties.precision` property, determines whether the results are displayed by default on {% data variables.product.prodname_dotcom %} so that the results with the highest `security-severity`, and highest `precision` are shown first. {% data variables.product.prodname_code_scanning_capc %} translates numerical scores as follows: over 9.0 is `critical`, 7.0 to 8.9  is `high`, 4.0 to 6.9 is `medium` and 3.9 or less is `low`. {% endif %}
+| `properties.security-severity` | **Recommended.** A string representing a score that indicates the level of severity, between 0.0 and 10.0, for security queries (`@tags` includes `security`). This, with the `properties.precision` property, determines whether the results are displayed by default on {% data variables.product.prodname_dotcom %} so that the results with the highest `security-severity`, and highest `precision` are shown first. {% data variables.product.prodname_code_scanning_capc %} translates numerical scores as follows: over 9.0 is `critical`, 7.0 to 8.9  is `high`, 4.0 to 6.9 is `medium` and 3.9 or less is `low`. {% endif %}
 
 ### `result` object