Pin TF version to 2.5.0 or lower (keras-team#1613)

* pin tf version

* tf version to <= 2.5.0

* update actions

* update

Co-authored-by: Haifeng Jin <[email protected]>

adapt to kt 1.0.3 (keras-team#1593)

Co-authored-by: Haifeng Jin <[email protected]>

change imdb batch_size

adapt to tf 2.5.0 (keras-team#1564)

Co-authored-by: Haifeng Jin <[email protected]>

Added num_layers to Choice in ConvBlock (keras-team#1443)

remove tf models as dependency

update docs for new release

Docs (keras-team#1355)

* fix broken tutorials

* Update docs for 1.0.9 release.