Update fello version

This brings in experimental CFF/CFF2 support.

Cargo.toml

diff --git a/Cargo.toml b/Cargo.toml
index 21ff1e9..461e733 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -52,7 +52,7 @@
 
 [workspace.dependencies]
 bytemuck = { version = "1.12.1", features = ["derive"] }
-fello = { git = "https://github.com/dfrg/fount", rev = "58a284eaae67512fb61cf76177c5d33238d79cb1" }
+fello = { git = "https://github.com/dfrg/fount", rev = "0a7c809716aeb96795325a74c91c048cf4980d73" }
 peniko = { git = "https://github.com/linebender/peniko", rev = "cafdac9a211a0fb2fec5656bd663d1ac770bcc81" }
 wgpu = "0.17"                                                                                               # NOTE: Make sure to keep this in sync with the version badge in README.md