[Docs] Add language identifiers to fenced code blocks (#28955)

Add language identifiers to code blocks

examples/research_projects/wav2vec2/FINE_TUNE_XLSR_WAV2VEC2.md

@@ -138,20 +138,20 @@ For bigger datasets, we recommend to train Wav2Vec2 locally instead of in a goog
 
 First, you need to clone the `transformers` repo with:
 
-```
+```bash
 $ git clone https://github.com/huggingface/transformers.git
 ```
 
 Second, head over to the `examples/research_projects/wav2vec2` directory, where the `run_common_voice.py` script is located.
 
-```
+```bash
 $ cd transformers/examples/research_projects/wav2vec2
 ```
 
 Third, install the required packages. The
 packages are listed in the `requirements.txt` file and can be installed with
 
-```
+```bash
 $ pip install -r requirements.txt
 ```
 
@@ -259,7 +259,7 @@ Then and add the following files that fully define a XLSR-Wav2Vec2 checkpoint in
 - `pytorch_model.bin`
 
 Having added the above files, you should run the following to push files to your model repository.  
-```
+```bash
 git add . && git commit -m "Add model files" && git push
 ```
 

examples/research_projects/wav2vec2/README.md

@@ -134,7 +134,7 @@ which helps with capping GPU memory usage.
 To learn how to deploy Deepspeed Integration please refer to [this guide](https://huggingface.co/transformers/main/main_classes/deepspeed.html#deepspeed-trainer-integration).
 
 But to get started quickly all you need is to install:
-```
+```bash
 pip install deepspeed
 ```
 and then use the default configuration files in this directory:
@@ -148,7 +148,7 @@ Here are examples of how you can use DeepSpeed:
 
 ZeRO-2:
 
-```
+```bash
 PYTHONPATH=../../../src deepspeed --num_gpus 2 \
 run_asr.py \
 --output_dir=output_dir --num_train_epochs=2 --per_device_train_batch_size=2 \
@@ -162,7 +162,7 @@ run_asr.py \
 ```
 
 For ZeRO-2 with more than 1 gpu you need to use (which is already in the example configuration file):
-```
+```json
     "zero_optimization": {
         ...
         "find_unused_parameters": true,
@@ -172,7 +172,7 @@ For ZeRO-2 with more than 1 gpu you need to use (which is already in the example
 
 ZeRO-3:
 
-```
+```bash
 PYTHONPATH=../../../src deepspeed --num_gpus 2 \
 run_asr.py \
 --output_dir=output_dir --num_train_epochs=2 --per_device_train_batch_size=2 \
@@ -192,7 +192,7 @@ It is recommended to pre-train Wav2Vec2 with Trainer + Deepspeed (please refer t
 
 Here is an example of how you can use DeepSpeed ZeRO-2 to pretrain a small Wav2Vec2 model:
 
-```
+```bash
 PYTHONPATH=../../../src deepspeed --num_gpus 4 run_pretrain.py \
 --output_dir="./wav2vec2-base-libri-100h" \
 --num_train_epochs="3" \
@@ -238,7 +238,7 @@ Output directory will contain 0000.txt and 0001.txt. Each file will have format
     
 #### Run command
 
-```
+```bash
 python alignment.py  \
 --model_name="arijitx/wav2vec2-xls-r-300m-bengali" \
 --wav_dir="./wavs"