chore(deps): update openfga/openfga docker tag to v1.8.6 (#153)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

docker/docker-compose-fga.yml

@@ -2,7 +2,7 @@ include:
   - docker-compose-pg.yml
 services:
   migrate:
-    image: openfga/openfga:v1.8.5
+    image: openfga/openfga:v1.8.6
     container_name: migrate
     command: migrate
     depends_on:
@@ -17,7 +17,7 @@ services:
     depends_on:
       migrate:
         condition: service_completed_successfully
-    image: openfga/openfga:v1.8.5
+    image: openfga/openfga:v1.8.6
     container_name: openfga
     environment:
       - OPENFGA_DATASTORE_ENGINE=postgres