readme: fix broken link (#98)

* fix broken link
* add a newline at the end of file

Co-authored-by: Ilia Sergunin <ilia.sergunin@gmail.com>

README.md

@@ -35,7 +35,7 @@ Compatibility beyond that is not guaranteed.
 
 **To use multiple transactions from different databases**, you need to set CtxKey in [Settings](trm/settings.go) by [WithCtxKey](trm/settings/option.go).
 
-**For nested transactions with different transaction managers**, you need to use [ChainedMW](trm/manager/chain.go) ([docs](https://pkg.go.dev/github.com/github.com/avito-tech/go-transaction-manager)).
+**For nested transactions with different transaction managers**, you need to use [ChainedMW](trm/manager/chain.go) ([docs](https://pkg.go.dev/github.com/avito-tech/go-transaction-manager/trm/manager)).
 
 **To skip a transaction rollback due to an error, use [ErrSkip](trm/manager.go#L20) or [Skippable](trm/manager.go#L24)**
 
@@ -146,4 +146,4 @@ func (r *repo) Save(ctx context.Context, u *user) error {
 
 ## Benchmark
 
-[Comparing](internal/benchmark/with_or_without_trm/README.md) examples with and without trm.
+[Comparing](internal/benchmark/with_or_without_trm/README.md) examples with and without trm.