* Update README.md
* Remove 1.20 support from CI workflows
* Update all go mod
* Add changelog entry
* Update go mod tidy target
* Run go mod tidy
* Replace sliceEqualFunc with slices.EqualFunc
* Replace grow with slices.Grow
* Replace ensureAttributesCapacity with slices.Grow
* Replace conditional with min
* Use slices module for slice comparison in metricdatatest