😒 chore(README): Link to main branch.

README.md

@@ -19,17 +19,17 @@ for (const edge of iter(maximumCardinalityMatching([[1, 2], [2, 3], [3, 4]]))) {
 // [3,4]
 ```
 
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+[![License](https://img.shields.io/github/license/aureooms/js-maximum-matching.svg)](https://raw.githubusercontent.com/aureooms/js-maximum-matching/main/LICENSE)
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+[![Code coverage (cov)](https://img.shields.io/codecov/c/gh/aureooms/js-maximum-matching/main.svg)](https://codecov.io/gh/aureooms/js-maximum-matching)
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doc/manual/example.md

@@ -1,3 +1,3 @@
 # Examples
 
-> More examples in [the test files](https://github.com/aureooms/js-maximum-matching/tree/master/test/src).
+> More examples in [the test files](https://github.com/aureooms/js-maximum-matching/tree/main/test/src).