Documentation/integrations: minor style fix.
**Perl libraries**
-- [hexfusion/perl-net-etcd](https://github.com/hexfusion/perl-net-etcd) Supports v3 grpc gateway HTTP API
-- [robn/p5-etcd](https://github.com/robn/p5-etcd) Supports v2
+- [hexfusion/perl-net-etcd](https://github.com/hexfusion/perl-net-etcd) - Supports v3 grpc gateway HTTP API
+- [robn/p5-etcd](https://github.com/robn/p5-etcd) - Supports v2
**Python libraries**
