[Fix] remove invisible character in habitat install url

Author: kew6688

source/en/user_guide/internnav/quick_start/installation.md

@@ -271,7 +271,7 @@ pip install -e habitat-baselines # install habitat_baselines
 ```
 Install pytorch and other requirements:
 ```bash
-pip install torch==2.6.0 torchvision==0.21.0 torchaudio==2.6.0 --index-url ​https://download.pytorch.org/whl/cu124
+pip install torch==2.6.0 torchvision==0.21.0 torchaudio==2.6.0 --index-url https://download.pytorch.org/whl/cu124
 pip install -r requirements/habitat_requirements.txt
 ```