Bump system-deps from 3.1.2 to 6

rav1e-fix-metadata.diff

@@ -19,7 +19,7 @@
 -
 -[target."cfg(fuzzing)".dependencies.rand_chacha]
 -version = "0.3"
-+version = "3.1.2"
++version = "6"
  [target."cfg(unix)".dependencies.signal-hook]
  version = "0.3"
  optional = true

rust-rav1e.spec

@@ -27,7 +27,7 @@ URL:            https://crates.io/crates/rav1e
 Source:         %{crates_source}
 # Initial patched metadata
 # * Remove fuzzing dependencies
-# * Relax system-deps dependency
+# * Bump system-deps dependency from 3.1.2 to 6
 Patch0:         rav1e-fix-metadata.diff
 
 ExclusiveArch:  %{rust_arches}