Add 53.4.0 to release schedule (#6896)

* Add 54.4.0 to release schedule

* prettoer

Author: alamb

README.md

@@ -63,13 +63,14 @@ is described in the [contributing] guide.
 
 Planned Release Schedule
 
-| Approximate Date | Version  | Notes                                   |
-| ---------------- | -------- | --------------------------------------- |
-| Nov 2024         | `53.3.0` | Minor, NO breaking API changes          |
-| Dec 2024         | `54.0.0` | Major, potentially breaking API changes |
-| Jan 2025         | `54.1.0` | Minor, NO breaking API changes          |
-| Feb 2025         | `54.2.0` | Minor, NO breaking API changes          |
-| Mar 2025         | `55.0.0` | Major, potentially breaking API changes |
+| Approximate Date | Version  | Notes                                      |
+| ---------------- | -------- | ------------------------------------------ |
+| Nov 2024         | `53.3.0` | Minor, NO breaking API changes             |
+| Dec 2024         | `54.0.0` | Major, potentially breaking API changes    |
+| Jan 2025         | `53.4.0` | Minor, NO breaking API changes (`53` line) |
+| Jan 2025         | `54.1.0` | Minor, NO breaking API changes             |
+| Feb 2025         | `54.2.0` | Minor, NO breaking API changes             |
+| Mar 2025         | `55.0.0` | Major, potentially breaking API changes    |
 
 [this ticket]: https://github.com/apache/arrow-rs/issues/5368
 [semantic versioning]: https://semver.org/