chore(codeowners): add Amanda to checkbox and radio (#28062)

Issue number: #

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## What is the current behavior?
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## What is the new behavior?
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-
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## Does this introduce a breaking change?

- [ ] Yes
- [ ] No

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Author: averyjohnston

.github/CODEOWNERS

@@ -38,6 +38,8 @@
 /core/src/components/accordion/ @liamdebeasi
 /core/src/components/accordion-group/ @liamdebeasi
 
+/core/src/components/checkbox/ @amandaejohnston
+
 /core/src/components/datetime/ @liamdebeasi @amandaejohnston @sean-perkins
 /core/src/components/datetime-button/ @liamdebeasi
 
@@ -50,6 +52,9 @@
 /core/src/components/picker-internal/ @liamdebeasi
 /core/src/components/picker-column-internal/ @liamdebeasi
 
+/core/src/components/radio/ @amandaejohnston
+/core/src/components/radio-group/ @amandaejohnston
+
 /core/src/components/refresher/ @liamdebeasi
 /core/src/components/refresher-content/ @liamdebeasi