Adjust photoprism migration marker

photoprism/rootfs/etc/cont-init.d/01-migrate.sh

@@ -0,0 +1,16 @@
+#!/usr/bin/with-contenv bashio
+# shellcheck shell=bash
+set -e
+
+slug=photoprism
+
+if [ -d "/homeassistant/addons_config/$slug" ]; then
+    echo "Migrating /homeassistant/addons_config/$slug to /addon_configs/xxx-$slug"
+    cp -rnf /homeassistant/addons_config/"$slug"/. /config/ || true
+    echo "Migrated to internal config folder accessible at /addon_configs/xxx-$slug" \
+        > "/homeassistant/addons_config/$slug/.migrate"
+fi
+
+if [ -d /config/addons_config ]; then
+    rm -rf /config/addons_config
+fi