build: fix fatal error: not in a git directory

Makefile

@@ -158,7 +158,11 @@ endif
 	@$(DOCKER_COMPOSE) exec -u$(WORDPRESS_CONTAINER_USER) $(WORDPRESS_CONTAINER_NAME) sh -c 'ln -sfn /tmp/$(PLUGIN_NAME)-plugin/tests/data/wp-cfm $${WORDPRESS_BASE_DIR:-/bitnami/wordpress}/wp-content/config'
 
 	@echo "[wordpress] Initializing git repository ($(MODE))"
-	@$(DOCKER_COMPOSE) exec -u$(WORDPRESS_CONTAINER_USER) $(WORDPRESS_CONTAINER_NAME) sh -c 'cd /tmp/$(PLUGIN_NAME)-plugin && git init && git config user.email "you@example.com" && git config user.name "Your Name"'
+	@$(DOCKER_COMPOSE) exec -u$(WORDPRESS_CONTAINER_USER) $(WORDPRESS_CONTAINER_NAME) sh -c 'cd /tmp/$(PLUGIN_NAME)-plugin && { \
+		git init; \
+		git config user.email "you@example.com"; \
+		git config user.name "Your Name"; \
+	}'
 
 	@echo "[wordpress] Installing dependencies ($(MODE))"
 	@# PHP 7.x and 8.x interpret composer.json's `extra.installer-paths` differently, perhaps due to different versions of Composer.