Update ghcr.io/searxng/searxng:latest Docker digest to a973f27 (#831)

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

Author: renovate[bot]

searxng/docker-compose.yml

@@ -8,7 +8,7 @@ networks:
 
 services:
   searxng:
-    image: ghcr.io/searxng/searxng:latest@sha256:754a07a64e926a1fc0a8a30cd7a07d08278188f0ef6143e38ad0b22ea8599c55
+    image: ghcr.io/searxng/searxng:latest@sha256:a973f277a9025be36675ee803039d5f309c57e8521a500b5edee4cdba01c316a
     restart: unless-stopped
     depends_on:
       - redis