ci: Add subsys to codeql

Signed-off-by: Arkadiusz Balys <arkadiusz.balys@nordicsemi.no>

Author: ArekBalysNordic

.github/codeql/codeql-c-config.yml

@@ -1,2 +1,3 @@
 paths:
   - samples
+  - subsys

.github/workflows/codeql.yml

@@ -23,12 +23,12 @@ jobs:
       fail-fast: false
       matrix:
         include:
-          - language: c-cpp
-            build-mode: none
-            config: ./.github/codeql/codeql-c-config.yml
           - language: actions
             build-mode: none
             config: ./.github/codeql/codeql-actions-config.yml
+          - language: c-cpp
+            build-mode: none
+            config: ./.github/codeql/codeql-c-config.yml
     steps:
       - name: Checkout
         uses: actions/checkout@08c6903cd8c0fde910a37f88322edcfb5dd907a8 # v5.0.0