fix: linting and formatting

rename_multimedia.sh

@@ -1,9 +1,9 @@
-#!/usr/bin/env bash
+#!/bin/bash
 
 # Rename all image and video files in the current directory by their capture/creation date.
 
 set -euo pipefail
-mkdir -p done
+mkdir -p 'done'
 
 # Directory to process (defaults to current directory)
 DIR="${1:-.}"