Keras Release 2.15.0

What's Changed

• Typofixes for StringLookup documentation by @cw118 in #18333
• Fix ModelCheckpoint trained-on batch counting when using steps_per_execution>1 by @jasnyj in #17632
• Fix legacy optimizer handling in compile_from_config(). by @nkovela1 in #18492
• Remove options arg from ModelCheckpoint callback for Keras V3 saving, streamline ModelCheckpoint saving flow. Parameterize associated tests. by @nkovela1 in #18545
• Use TENSORFLOW_VERSION when available during pip_build script by @sampathweb in #18739

New Contributors

• @cw118 made their first contribution in #18333
• @jasnyj made their first contribution in #17632

Full Changelog: v2.14.0...v2.15.0