ci: update actions and images

Updates some actions to run build steps in container instead of the
whole workflow.

.github/workflows/ekf_functional_change_indicator.yml

@@ -1,21 +1,28 @@
 name: EKF Change Indicator
 
-on: pull_request
+on:
+  pull_request:
+    branches:
+    - '*'
 
 jobs:
   unit_tests:
     runs-on: ubuntu-latest
-    container: px4io/px4-dev-base-focal:2021-09-08
     steps:
-    - uses: actions/checkout@v2.3.1
+    - uses: actions/checkout@v4
       with:
         fetch-depth: 0
-    - name: checkout newest version of branch
-      run: |
-        git fetch origin pull/${{github.event.pull_request.number}}/head:${{github.head_ref}}
-        git checkout ${GITHUB_HEAD_REF}
+
     - name: main test
-      run: make tests TESTFILTER=EKF
+      uses: addnab/docker-run-action@v3
+      with:
+        image: px4io/px4-dev-base-focal:2021-09-08
+        options: -v ${{ github.workspace }}:/workspace
+        run: |
+          cd /workspace
+          git config --global --add safe.directory /workspace
+          make tests TESTFILTER=EKF
+
     - name: Check if there is a functional change
       run: git diff --exit-code
       working-directory: src/modules/ekf2/test/change_indication