Correct 1.2.0 changelog

[ni-jfitzger]

• This contribution adheres to CONTRIBUTING.md.
• I've updated CHANGELOG.md if applicable.
• [ ] I've added tests applicable for this pull request

What does this Pull Request accomplish?

Our CHANGELOG incorrectly stated that we added Python 3.8 support in both 1.1.4 and 1.2.0. In 1.2.0, we added the classifier to declare support on the PyPI page, because we neglected to do so in 1.1.4.

This change clarifies the 1.2.0 section of the CHANGELOG.

List issues fixed by this Pull Request below, if any.

None

What testing has been done?

PR Checks

[codecov-commenter]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 82.35%. Comparing base (dd57eae) to head (fff98e8).
⚠️ Report is 72 commits behind head on master.

❌ Your project status has failed because the head coverage (82.35%) is below the target coverage (85.00%). You can increase the head coverage or adjust the target coverage.

❗ There is a different number of reports uploaded between BASE (dd57eae) and HEAD (fff98e8). Click for more details.

HEAD has 10 uploads less than BASE

Flag	BASE (dd57eae)	HEAD (fff98e8)
niscopeunittests	4	3
nisesystemtests	1	0
niswitchsystemtests	1	0
nimodinstsystemtests	1	0
nidmmsystemtests	1	0
niscopesystemtests	1	0
nifgensystemtests	1	0
nidcpowersystemtests	1	0
nitclksystemtests	1	0
nidigitalsystemtests	1	0

Additional details and impacted files

@@ Coverage Diff @@## master #2074 +/- ##
==========================================
- Coverage 91.33% 82.35% -8.99% 
==========================================
Files 66 28 -38 Lines 16274 4001 -12273 ==========================================
- Hits 14864 3295 -11569 + Misses 1410 706 -704 

Flag	Coverage Δ
codegenunittests	84.95% <ø> (ø)
nidcpowersystemtests	?
nidcpowerunittests	89.53% <ø> (ø)
nidigitalsystemtests	?
nidigitalunittests	68.45% <ø> (ø)
nidmmsystemtests	?
nifakeunittests	87.24% <ø> (ø)
nifgensystemtests	?
nimodinstsystemtests	?
nimodinstunittests	94.20% <ø> (ø)
niscopesystemtests	?
niscopeunittests	43.20% <ø> (ø)
nisesystemtests	?
niswitchsystemtests	?
nitclksystemtests	?
nitclkunittests	98.26% <ø> (ø)

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see 42 files with indirect coverage changes

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[ni-jfitzger]

Do not merge until after the 1.4.9 release.

[ni-jfitzger]

The CHANGELOG has changed, since this PR was created. I'll need to pull main and recreate the change.