New dict call fixings #38138
xref #38138

File modified: pandas/core/strings/accesory.py

Changed unnecessary dict calls for flake8 (C408) standard:

Rewrite dict() as {}


- [ ] closes #xxxx
- [x] tests added / passed
- [x] passes `black pandas`
- [x] passes `git diff upstream/master -u -- "*.py" | flake8 --diff`
- [x] whatsnew entry

thanks @UrielMaD 