API review feedback

[martintmk]

Details on the issue fix or feature implementation

Some low-effort changes based on the API review.

#1233

Confirm the following

• I started this PR by branching from the head of the default branch
• I have targeted the PR to merge into the default branch
• I have included unit tests for the issue/feature
• I have successfully run a local build

[codecov]

Codecov Report

Merging #1239 (9efb528) into main (141bd0a) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##             main    #1239   +/-   ##
=======================================
  Coverage   82.91%   82.92%           
=======================================
  Files         262      262           
  Lines        6141     6143    +2     
  Branches      966      966           
=======================================
+ Hits         5092     5094    +2     
  Misses        844      844           
  Partials      205      205           

Flag	Coverage Δ
linux	82.92% <100.00%> (+<0.01%)	⬆️
macos	82.92% <100.00%> (+<0.01%)	⬆️
windows	?

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...Core/CircuitBreaker/CircuitBreakerManualControl.cs	100.00% <ø> (ø)
src/Polly.Core/Strategy/Outcome.cs	100.00% <ø> (ø)
...dencyInjection/PollyServiceCollectionExtensions.cs	100.00% <ø> (ø)
src/Polly.Core/Strategy/PredicateBuilder.cs	100.00% <100.00%> (ø)

[martintmk]

@martincostello I think we can also merge this one as these are some simple non-controversial changes based on the review feedback.