multimedia/svt-av1: unbreak fetch

Fetched file size mismatch (expected 5534, actual 5526)

-index 4c0827cc7..4f32f9cfa 100644
+index 4c0827cc..4f32f9cf 100644
-index bf6d42019..d36399117 100644
+index bf6d4201..d3639911 100644
-index 9c456c2f0..e183d2e72 100644
+index 9c456c2f..e183d2e7 100644
-index 000000000..b04b2b1c8
+index 00000000..b04b2b1c

Submitted by: vishwin (based on)
Differential Revision: https://reviews.freebsd.org/D32284