[dav1d] Fix a README typo. NFC.

mstorsjo · mstorsjo · commit 6e9e58581f63 · 2024-12-19T14:32:08.000+02:00
diff --git a/External/dav1d/README.md b/External/dav1d/README.md
@@ -158,7 +158,7 @@ On Windows, `pmccntr_el0` is used; this register should always be
 accessible from userspace on Windows.
 
 
-Evaulating vectorization effectiveness
+Evaluating vectorization effectiveness
 --------------------------------------
 
 For evaluating e.g. the effectiveness of compiler autovectorization,
