chore(release): Bump version to 0.15.0 (#511)

<!-- CURSOR_SUMMARY -->
> [!NOTE]
> **Low Risk**
> Low risk: this only updates the package version in `pyproject.toml`
and does not change runtime logic.
> 
> **Overview**
> Bumps the `redisvl` package version in `pyproject.toml` from `0.14.1`
to `0.15.0` for the next release.
> 
> <sup>Written by [Cursor
Bugbot](https://cursor.com/dashboard?tab=bugbot) for commit
66e357b. This will update automatically
on new commits. Configure
[here](https://cursor.com/dashboard?tab=bugbot).</sup>
<!-- /CURSOR_SUMMARY -->

Author: vishal-bala

pyproject.toml

@@ -1,7 +1,7 @@
 [project]
 name = "redisvl"
 # NOTE: This version value is automatically incremented by the release workflow - do not manually adjust it.
-version = "0.14.1"
+version = "0.15.0"
 description = "Python client library and CLI for using Redis as a vector database"
 authors = [{ name = "Redis Inc.", email = "applied.ai@redis.com" }]
 requires-python = ">=3.9.2,<3.15"