Fix changelog for upcoming release

[WhyNotHugo]

2.1.0 is not out yet; latest changelog entries belong there.

[codecov]

Codecov Report

Merging #376 (84d8ca9) into main (a343a59) will decrease coverage by 0.25%.
Report is 21 commits behind head on main.
The diff coverage is 72.22%.

@@            Coverage Diff             @@
##             main     #376      +/-   ##
==========================================
- Coverage   78.99%   78.74%   -0.25%     
==========================================
  Files          29       29              
  Lines        1947     1943       -4     
  Branches      241      240       -1     
==========================================
- Hits         1538     1530       -8     
- Misses        293      299       +6     
+ Partials      116      114       -2     

Files	Coverage Δ
payments/authorizenet/__init__.py	80.00% <100.00%> (-0.56%)	⬇️
payments/braintree/__init__.py	80.76% <100.00%> (ø)
payments/coinbase/__init__.py	94.44% <100.00%> (ø)
payments/core.py	83.33% <ø> (ø)
payments/cybersource/forms.py	81.63% <100.00%> (ø)
payments/dotpay/__init__.py	86.84% <100.00%> (ø)
payments/dotpay/forms.py	92.06% <100.00%> (ø)
payments/dummy/__init__.py	86.00% <100.00%> (ø)
payments/dummy/forms.py	100.00% <100.00%> (ø)
payments/forms.py	100.00% <100.00%> (ø)
... and 16 more

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