[benchmarks] fix dependency issue related to bigtable (#1620)

Author: kvignesh1420

.github/workflows/benchmarks.yml

@@ -36,7 +36,7 @@ jobs:
           echo ${{ matrix.version }} | awk -F: '{print $1}' | xargs python -m pip install -U
           echo ${{ matrix.version }} | awk -F: '{print $2}' | xargs python -m pip install --no-deps -U
           python -m pip install tensorflow-io-gcs-filesystem-nightly
-          python -m pip install -q scikit-image pytest pytest-benchmark boto3 fastavro avro-python3 scikit-image pandas pyarrow==2.0.0 google-cloud-pubsub==2.1.0 google-cloud-bigquery-storage==1.1.0 google-cloud-bigquery==2.3.1 google-cloud-storage==1.32.0 azure-storage-blob==12.7.1
+          python -m pip install -q scikit-image pytest pytest-benchmark boto3 fastavro avro-python3 scikit-image pandas pyarrow==2.0.0 google-cloud-pubsub==2.1.0 google-cloud-bigquery-storage==1.1.0 google-cloud-bigquery==2.3.1 google-cloud-storage==1.32.0 google-cloud-bigtable==1.6.0 azure-storage-blob==12.7.1
           python -m pip freeze
           python -c 'import tensorflow as tf; print(tf.version.VERSION)'
           python -c 'import tensorflow_io as tfio; print(tfio.version.VERSION)'
@@ -75,7 +75,7 @@ jobs:
           echo ${{ matrix.version }} | awk -F: '{print $1}' | xargs python -m pip install -U
           echo ${{ matrix.version }} | awk -F: '{print $2}' | xargs python -m pip install --no-deps -U
           python -m pip install tensorflow-io-gcs-filesystem-nightly
-          python -m pip install -q scikit-image pytest pytest-benchmark boto3 fastavro avro-python3 scikit-image pandas pyarrow==2.0.0 google-cloud-pubsub==2.1.0 google-cloud-bigquery-storage==1.1.0 google-cloud-bigquery==2.3.1 google-cloud-storage==1.32.0 azure-storage-blob==12.7.1
+          python -m pip install -q scikit-image pytest pytest-benchmark boto3 fastavro avro-python3 scikit-image pandas pyarrow==2.0.0 google-cloud-pubsub==2.1.0 google-cloud-bigquery-storage==1.1.0 google-cloud-bigquery==2.3.1 google-cloud-storage==1.32.0 google-cloud-bigtable==1.6.0 azure-storage-blob==12.7.1
           python -m pip freeze
           python -c 'import tensorflow as tf; print(tf.version.VERSION)'
           python -c 'import tensorflow_io as tfio; print(tfio.version.VERSION)'