Docs: fix incorrect requirements install path in troubleshooting and developer FAQ (#4991)

Co-authored-by: Rishabh Jain <rishabhjain2018@gmail.com>

Author: Youssef-SH

docs/source/07-troubleshooting/support/faq.md

@@ -91,7 +91,7 @@ This means your new code isn't covered by tests. Click on the coverage report to
 
 ## Logs & Debugging
 
-### Q. How do I debug `psycopg2` installation errors while using `pip install -r dev/requirement.txt`?
+### Q. How do I debug `psycopg2` installation errors while using `pip install -r requirements/dev.txt`?
 
 Error:
 

docs/source/faq(developers).md

@@ -27,7 +27,7 @@ We have removed the documentation for setting up using virtual environment since
 
 ### Common Errors during installation
 
-#### Q. While using `pip install -r dev/requirement.txt`
+#### Q. While using `pip install -r requirements/dev.txt`
 
 ```
   Writing manifest file 'pip-egg-info/psycopg2.egg-info/SOURCES.txt'
@@ -43,7 +43,7 @@ Use the following commands in order to solve the error:
 2. `sudo apt-get install python-psycopg2`
 3. `sudo apt-get install libpq-dev`
 
-#### Q. While using `pip install -r dev/requirement.txt`
+#### Q. While using `pip install -r requirements/dev.txt`
 
 ```
 Command “python setup.py egg_info” failed with error code 1 in