chore: update security insights configuration and clean up formatting (#11449)

# Description

Validated with CUE and cleaned up based on the results.

## Type of change

- This pull request is a minor refactor, code cleanup, test improvement,
or other maintenance task and doesn't change the functionality of Radius
(issue link optional).

## Contributor checklist
Please verify that the PR meets the following requirements, where
applicable:

<!--
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mutually exclusive.
See:
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- An overview of proposed schema changes is included in a linked GitHub
issue.
    - [ ] Yes <!-- TaskRadio schema -->
    - [x] Not applicable <!-- TaskRadio schema -->
- A design document PR is created in the [design-notes
repository](https://github.com/radius-project/design-notes/), if new
APIs are being introduced.
    - [ ] Yes <!-- TaskRadio design-pr -->
    - [x] Not applicable <!-- TaskRadio design-pr -->
- The design document has been reviewed and approved by Radius
maintainers/approvers.
    - [ ] Yes <!-- TaskRadio design-review -->
    - [x] Not applicable <!-- TaskRadio design-review -->
- A PR for the [samples
repository](https://github.com/radius-project/samples) is created, if
existing samples are affected by the changes in this PR.
    - [ ] Yes <!-- TaskRadio samples-pr -->
    - [x] Not applicable <!-- TaskRadio samples-pr -->
- A PR for the [documentation
repository](https://github.com/radius-project/docs) is created, if the
changes in this PR affect the documentation or any user facing updates
are made.
    - [ ] Yes <!-- TaskRadio docs-pr -->
    - [x] Not applicable <!-- TaskRadio docs-pr -->
- A PR for the [recipes
repository](https://github.com/radius-project/recipes) is created, if
existing recipes are affected by the changes in this PR.
    - [ ] Yes <!-- TaskRadio recipes-pr -->
    - [x] Not applicable <!-- TaskRadio recipes-pr -->

Signed-off-by: Dariusz Porowski <3431813+DariuszPorowski@users.noreply.github.com>

Author: DariuszPorowski

.github/security-insights.yml

@@ -1,7 +1,10 @@
+# CUE schema for validation: https://raw.githubusercontent.com/ossf/security-insights/refs/heads/main/spec/schema.cue
+# cue vet -d '#SecurityInsights' schema.cue .github/security-insights.yml
+---
 header:
   schema-version: 2.0.0
-  last-updated: '2026-02-20'
-  last-reviewed: '2026-02-20'
+  last-updated: 2026-02-20
+  last-reviewed: 2026-02-20
   url: https://github.com/radius-project/radius
   comment: >-
     This file contains all possible information for both project and repository,
@@ -14,7 +17,7 @@ project:
   homepage: https://radapp.io
   roadmap: https://aka.ms/radius-roadmap
   steward:
-    uri: ''
+    uri: ""
     comment: No steward designated
   administrators:
     - name: Sylvain Niles
@@ -157,13 +160,13 @@ repository:
           release: false
       - name: CodeQL
         type: SAST
-        version: '2'
+        version: "2"
         rulesets:
           - default
         results:
           ci:
             name: CodeQL GitHub workflow
-            predicate-uri: ''
+            predicate-uri: ""
             location: >-
               https://github.com/radius-project/radius/blob/main/.github/workflows/codeql.yml
             comment: GitHub workflow to run CodeQL