feat(action): update ggshield to 1.39.0

Author: salome-voltz

action.yml

@@ -14,7 +14,7 @@ branding:
   color: "blue"
 runs:
   using: "docker"
-  image: "docker://gitguardian/ggshield:v1.38.0"
+  image: "docker://gitguardian/ggshield:v1.39.0"
   entrypoint: "/app/docker/actions-secret-entrypoint.sh"
   args:
     - ${{ inputs.args }}