docs: update default value for dns caching env (#473)

Author: manuel-rw

docs/advanced/environment-variables/index.mdx

@@ -29,7 +29,7 @@ Using the `PUID` and `PGID` will require you to set the correct permissions on t
 | ``PGID``                 | Group ID to run the container as | Any valid group ID | ``0`` |
 | ``LOG_LEVEL``           | Log level to use | ``debug`` / ``info`` / ``warn`` / ``error`` | ``info`` |
 | ``NO_EXTERNAL_CONNECTION`` | Disables some requests that need internet connection | `true` or `false` | `false` |
-| ``ENABLE_DNS_CACHING`` | Enables dns caching. This is not yet working for all users. See [#4006](https://github.com/homarr-labs/homarr/issues/4006) | `true` or `false` | `false` |
+| ``ENABLE_DNS_CACHING`` | Enables dns caching. Enabled by default, but if you experience issues with IPv6 or static IPs, see [#4006](https://github.com/homarr-labs/homarr/issues/4006) or disable this flag | `true` or `false` | `true` |
 
 
 
@@ -99,4 +99,4 @@ The advanced deployments environment variables should only be used if you know w
 
 | Environment Variable     | Description |
 | ------------------------ | ----------- |
-| ``DB_MIGRATIONS_DISABLED`` | Disable db migrations. For example for helm charts |
+| ``DB_MIGRATIONS_DISABLED`` | Disable db migrations. For example for helm charts |