Mark CI workspace as safe for git

Author: Dunky13

.github/workflows/light-firmware-build.yml

@@ -41,6 +41,13 @@ jobs:
           fetch-depth: 1
           submodules: false
 
+      - name: Mark workspace safe for git
+        shell: bash
+        run: |
+          set -euo pipefail
+          git config --global --add safe.directory "${GITHUB_WORKSPACE}"
+          git config --global --add safe.directory "${GITHUB_WORKSPACE}/esp-matter"
+
       - name: Resolve esp-matter revision
         id: esp-matter-rev
         shell: bash