Change Apex error for warning in NLP collection

Signed-off-by: Oleksii Kuchaiev <okuchaiev@nvidia.com>

Merge branch 'r1.6.1' of github.com:NVIDIA/NeMo into r1.6.1

Correct configS

Signed-off-by: smajumdar <titu1994@gmail.com>

Update changelog to add authors

Signed-off-by: smajumdar <titu1994@gmail.com>

v1.5.1 Release

update README

Signed-off-by: ericharper <complex451@gmail.com>

New NMT Models (NVIDIA-NeMo#2925)

* New pretrained models

Signed-off-by: MaximumEntropy <sandeep.subramanian.1@umontreal.ca>

* Update NMT docs

Signed-off-by: MaximumEntropy <sandeep.subramanian.1@umontreal.ca>

Co-authored-by: Eric Harper <complex451@gmail.com>

Adding Conformer-Transducer docs. (NVIDIA-NeMo#2920)

* added Conformer-Transducer docs.

Signed-off-by: Vahid <vnoroozi@nvidia.com>

* Added contextnet.

Signed-off-by: Vahid <vnoroozi@nvidia.com>

* fixed the title.

Signed-off-by: Vahid <vnoroozi@nvidia.com>

[DOCS] Updating adobe and copyright for docs (NVIDIA-NeMo#2740)

* update

Signed-off-by: ericharper <complex451@gmail.com>

* update

Signed-off-by: ericharper <complex451@gmail.com>

* update

Signed-off-by: ericharper <complex451@gmail.com>

* update

Signed-off-by: ericharper <complex451@gmail.com>

* update

Signed-off-by: ericharper <complex451@gmail.com>

* update

Signed-off-by: ericharper <complex451@gmail.com>

Upper bound transformers for 1.2 (NVIDIA-NeMo#2584)

* upper bound transformers and name change jarvis to riva

Signed-off-by: ericharper <complex451@gmail.com>

* upper bound transformers and name change jarvis to riva

Signed-off-by: ericharper <complex451@gmail.com>