contrib: rav1e-vendor checksum mismatch

rav1e is failing to build in contrib due to a checksum mismatch. This will fix it but it seems suspect to change the checksum for the same version:

diff --git a/contrib/src/rav1e/vendor-SHA512SUMS b/contrib/src/rav1e/vendor-SHA512SUMS
index 254972dd06..5780a6b2a6 100644
--- a/contrib/src/rav1e/vendor-SHA512SUMS
+++ b/contrib/src/rav1e/vendor-SHA512SUMS
@@ -1 +1 @@
-fa67587eee85c49b409f8eede4671c823b70b837e807308117e4cc5ed2b890d4ab1b4e3e4447427cad24cbe7d38018bb96b72b52cc9fa3fbb80a2c28380211ff  rav1e-0.7.1-vendor.tar.bz2
+c2e03317ac36fe775863f38fc2d2eafc4075d152e26aefe932885af7dd3619ba5e16cde07f4eb48519c64fc8711d195b4fb51f770fcae081d1f486d089a1a8d1  rav1e-0.7.1-vendor.tar.bz2

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