Reorder documentation about security inputs (#3751)

Reorder documentation about security inputs (#3751)

Signed-off-by: CARON Alice <alice.caron@rte-france.com>

Author: alicecaron

docs/simulation/security/index.md

@@ -58,7 +58,18 @@ A contingency is made of contingency elements. A contingency can trigger one ele
 at a time (N-K). Bus bar and bus contingencies are special N-K contingencies as they trigger all the equipments
 connected to a given bus bar section.
 
-### Remedial actions
+### Operator strategies
+
+An operator strategy is applied in pre-contingency or after a contingency, depending on the contingency context
+provided. A contingency context can be:
+- `NONE` a pre-contingency state only
+- `SPECIFIC` a post-contingency state on a specific contingency
+- `ONLY_CONTINGENCIES` a post-contingency state on every contingency
+- `ALL` both pre-contingency and post-contingency states
+
+An operator strategy groups a condition and a list of remedial actions.
+
+#### Remedial actions
 
 Remedial actions are actions that are applied when limit violations occur. Supported actions are:
 
@@ -88,7 +99,7 @@ Remedial actions can be *preventive* or *curative*:
 
 Note: you can find the current list of remedial actions implemented in the PowSyBl Open Load Flow security analysis provider in the [PowSyBl Open Load Flow documentation](inv:powsyblopenloadflow:*:*#security/inputs).
 
-### Conditions
+#### Conditions
 
 Actions are applied if a condition is met. The conditions can be diversified and extended in the future:
 
@@ -104,14 +115,7 @@ Actions are applied if a condition is met. The conditions can be diversified and
   Four condition types are available depending on the equipment to target: branch threshold condition, three-winding
   transformer threshold condition, injection threshold condition and AC/DC converter threshold condition.
 
-### Operator strategies
 
-An operator strategy is applied in pre-contingency or after a contingency, depending on the contingency context
-provided. A contingency context can be a pre-contingency state only (`NONE`), a post-contingency state (on a specific
-contingency (`SPECIFIC`) or on every contingency (`ONLY_CONTINGENCIES`)) or both pre-contingency and post-contingency
-states (`ALL`).
-
-An operator strategy groups a condition and a list of remedial actions.
 
 ### State monitors