reproduce fuzz-failure (#1979)

It's notable that this regression was introduced in `v0.2.11`.

```
❯ cargo update -p jiff
    Updating crates.io index
     Locking 2 packages to latest compatible versions
    Updating jiff v0.2.10 -> v0.2.11
    Updating jiff-static v0.2.10 -> v0.2.11
note: pass `--verbose` to see 10 unchanged dependencies behind latest
```

Thus, the issue didn't reproduce in v0.2.10.

Author: Byron

Cargo.lock

@@ -328,6 +328,9 @@ mod relative {
 mod fuzz {
     #[test]
     fn invalid_but_does_not_cause_panic() {
+        for input in ["fRi "] {
+            gix_date::parse(input, None).ok();
+        }
         for input in ["-9999-1-1", "7	-𬞋", "5 ڜ-09", "-4 week ago Z", "8960609 day ago"] {
             gix_date::parse(input, Some(std::time::UNIX_EPOCH)).ok();
         }