docs: Update ssrf_proxy related doc link in docker-compose file (#8516)

docker-legacy/docker-compose.middleware.yaml

@@ -73,7 +73,7 @@ services:
 
   # ssrf_proxy server
   # for more information, please refer to
-  # https://docs.dify.ai/learn-more/faq/self-host-faq#id-18.-why-is-ssrf_proxy-needed
+  # https://docs.dify.ai/learn-more/faq/install-faq#id-18.-why-is-ssrf_proxy-needed
   ssrf_proxy:
     image: ubuntu/squid:latest
     restart: always

docker-legacy/docker-compose.yaml

@@ -500,7 +500,7 @@ services:
 
   # ssrf_proxy server
   # for more information, please refer to
-  # https://docs.dify.ai/learn-more/faq/self-host-faq#id-18.-why-is-ssrf_proxy-needed
+  # https://docs.dify.ai/learn-more/faq/install-faq#id-18.-why-is-ssrf_proxy-needed
   ssrf_proxy:
     image: ubuntu/squid:latest
     restart: always

docker/docker-compose.middleware.yaml

@@ -63,7 +63,7 @@ services:
 
   # ssrf_proxy server
   # for more information, please refer to
-  # https://docs.dify.ai/learn-more/faq/self-host-faq#id-18.-why-is-ssrf_proxy-needed
+  # https://docs.dify.ai/learn-more/faq/install-faq#id-18.-why-is-ssrf_proxy-needed
   ssrf_proxy:
     image: ubuntu/squid:latest
     restart: always