builtin.conf: enable antiringing in high quality profile

General consensus is that ortho scalers antiring while fast is not that
good, let's use it in high-quality profile only.

DOCS/man/options.rst

@@ -5871,12 +5871,15 @@ them.
     being increased a bit).
 
 ``--scale-antiring=<value>``, ``--cscale-antiring=<value>``, ``--dscale-antiring=<value>``, ``--tscale-antiring=<value>``
-    Set the antiringing strength. This tries to eliminate ringing, but can
-    introduce other artifacts in the process. Must be a float number between
-    0.0 and 1.0. The default value of 0.0 disables antiringing entirely.
+    Set the antiringing strength. This option tries to eliminate ringing, but can
+    introduce other artifacts in the process. The value must be a floating-point
+    number between 0.0 and 1.0.
+
+    The default is 0.0. The ``high-quality`` profile sets this to 0.6, which is
+    a fairly conservative value and should subtly enhance image quality.
 
     Note that this doesn't affect the special filters ``bilinear`` and
-    ``bicubic_fast``, nor does it affect any polar (EWA) scalers.
+    ``bicubic_fast``, nor does it affect any polar (EWA) scalers with vo_gpu.
 
     On ``--vo=gpu-next``, this also affects polar (EWA) scalers. Certain
     filter aliases may also implicitly enable antiringing, regardless of this

etc/builtin.conf

@@ -53,6 +53,7 @@ allow-delayed-peak-detect=yes
 
 [high-quality]
 scale=ewa_lanczossharp
+scale-antiring=0.6
 hdr-peak-percentile=99.995
 hdr-contrast-recovery=0.30