Bump re_mp4 to 0.4.0 (#11226)

### Related

rerun-io/re_mp4#20

### What
For mp4 videos of 1 frame rerun fails to load them at all with a weird
error about indexes needing to be the same length
* I fixed something that caused us to skip frames when they are all the
same size (not sure how common that is outside of single frame samples).
Right now this points to that branch to demo nothing breaks. Will need
to update to latest version once we update the crate.

Pointing at the same directory containing episode 1 and episode 58
Before (Where we both couldn't load episode 58 ever but also couldn't
load it because our vector was of length 2):
<img width="2032" height="1167" alt="Screenshot 2025-09-15 at 5 47
46 PM"
src="https://github.com/user-attachments/assets/db33ec58-7432-4069-bb5b-a5f02f4ba356"
/>

After (where things appear to work):
<img width="2032" height="1167" alt="Screenshot 2025-09-15 at 5 52
05 PM"
src="https://github.com/user-attachments/assets/b24c823c-4051-4d5f-a1bc-8a5cc39f9a67"
/>

NOTE: I put a link to the re_mp4 branch for validation but I assume we
will land that then update the version here.

Author: ntjohnson1

.typos.toml

@@ -23,6 +23,7 @@ somes = "somes" # many `Some`
 teh = "teh"     # part of @teh-cmc
 trak = "trak"   # mp4 crate spelling
 typ = "typ"     # We cannot write "type" in rust
+Yoh = "Yoh"     # Part of @YohDeadfall
 
 # Use the more common spelling
 adaptor = "adapter"

Cargo.lock

@@ -8008,9 +8008,9 @@ dependencies = [
 
 [[package]]
 name = "re_mp4"
-version = "0.3.0"
+version = "0.4.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
-checksum = "751650322999417b64a5a89b034b4e34e4596826e5dfee9327856db77ca511e3"
+checksum = "02cf24563b952aa0d55031cca30e58c11f853e59806ba5ac2a28054caffc3eb5"
 dependencies = [
  "byteorder",
  "bytes",

Cargo.toml

@@ -147,7 +147,7 @@ re_viewport_blueprint = { path = "crates/viewer/re_viewport_blueprint", version
 re_web_viewer_server = { path = "crates/viewer/re_web_viewer_server", version = "=0.26.0-alpha.1", default-features = false }
 
 # Rerun crates in other repos:
-re_mp4 = "0.3.0"
+re_mp4 = "0.4.0"
 
 # If this package fails to build, install `nasm` locally, or build through `pixi`.
 # NOTE: we use `dav1d` as an alias for our own re_rav1d crate