Roadmap: add Safety Analysis and Safety Management to Qualifiable State

Addresses PR #230 review comments by @aschemmel-tech and @masc2023:

- Add **Safety Analysis** to the mandatory process areas list — it is
  already highlighted (blue) in the Development grid below, the prose
  list was inconsistent.
- Add **Safety Management** to the mandatory list and switch its
  Management-grid card from card-pa-grey to card-pa-highlight. Safety
  Management produces the safety manuals and the safety (release)
  package required for qualification, so it is a mandatory condition
  for the Qualifiable State.
- Add a short rationale paragraph explaining why both PAs are
  mandatory.

Author: antonkri

docs/s_core_v_1/roadmap/roadmap.rst

@@ -66,7 +66,12 @@ Qualifiable State
 -----------------
 
 All modules follow the S-CORE process and use S-CORE tools for
-artifact generation across the following process areas: **Requirements Engineering**, **Architecture Design**, **Implementation**, **Verification**.
+artifact generation across the following process areas: **Requirements Engineering**, **Architecture Design**, **Implementation**, **Verification**, **Safety Analysis**, and **Safety Management**.
+
+Safety Management is mandatory because it produces the safety manuals
+and the safety (release) package required for qualification; Safety
+Analysis is mandatory to identify and mitigate safety hazards on the
+development side.
 
 Management
 ^^^^^^^^^^
@@ -81,7 +86,7 @@ Management
       Manage the common platform, its modules and integration.
 
    .. grid-item-card:: `Safety Management <https://eclipse-score.github.io/process_description/main/process_areas/safety_management/index.html>`__
-      :class-card: card-pa-grey
+      :class-card: card-pa-highlight
 
       Plan and oversee safety activities across the project lifecycle.