Include colrv1 in script preparing fuzzer corpora (#101)

Hopefully addresses no coverage being reported for the colrv1 fuzzer so
far in oss-fuzz.
diff --git a/fuzzing/scripts/prepare-oss-fuzz.sh b/fuzzing/scripts/prepare-oss-fuzz.sh
index 72681c3..68054a3 100644
--- a/fuzzing/scripts/prepare-oss-fuzz.sh
+++ b/fuzzing/scripts/prepare-oss-fuzz.sh
@@ -33,6 +33,8 @@
     "cidtype1-render"
     "cidtype1-render-ftengine"
 
+    "colrv1"
+
     "pcf"
     "pcf-render"