Update FSRS

We're on the commit prior to
https://github.com/open-spaced-repetition/fsrs-rs/pull/141, as that is
going to require work that will need to wait until after 23.12

Cargo.lock

@@ -1813,7 +1813,7 @@ dependencies = [
 [[package]]
 name = "fsrs"
 version = "0.1.0"
-source = "git+https://github.com/open-spaced-repetition/fsrs-rs.git?rev=d8b2aad417346aaab9f72c399cde6119de1da52f#d8b2aad417346aaab9f72c399cde6119de1da52f"
+source = "git+https://github.com/open-spaced-repetition/fsrs-rs.git?rev=458ed0a55950a0719d4b9b676630638bc30b2d91#458ed0a55950a0719d4b9b676630638bc30b2d91"
 dependencies = [
  "burn",
  "itertools 0.12.0",

Cargo.toml

@@ -36,7 +36,7 @@ rev = "184b2ca50ed39ca43da13f0b830a463861adb9ca"
 
 [workspace.dependencies.fsrs]
 git = "https://github.com/open-spaced-repetition/fsrs-rs.git"
-rev = "d8b2aad417346aaab9f72c399cde6119de1da52f"
+rev = "458ed0a55950a0719d4b9b676630638bc30b2d91"
 # path = "../../../fsrs-rs"
 
 [workspace.dependencies]

rslib/src/scheduler/fsrs/memory_state.rs

@@ -341,7 +341,7 @@ mod tests {
             item.starting_state,
             Some(MemoryState {
                 stability: 99.999954,
-                difficulty: 5.287041,
+                difficulty: 4.966779,
             })
         );
         let mut card = Card {
@@ -352,8 +352,8 @@ mod tests {
         assert_eq!(
             card.memory_state,
             Some(FsrsMemoryState {
-                stability: 248.5813,
-                difficulty: 5.2646275,
+                stability: 248.65475,
+                difficulty: 4.9747725,
             })
         );
         // but if there's only a single revlog entry, we'll fall back on current card
@@ -377,7 +377,7 @@ mod tests {
             card.memory_state,
             Some(FsrsMemoryState {
                 stability: 122.99994,
-                difficulty: 7.0797696
+                difficulty: 6.859577
             })
         );
         Ok(())
@@ -401,7 +401,7 @@ mod tests {
             Some(
                 MemoryState {
                     stability: 99.999954,
-                    difficulty: 9.857409
+                    difficulty: 9.793356
                 }
                 .into()
             )