Improve README

Signed-off-by: Sylvain Rabot <sylvain@abstraction.fr>

Author: sylr

README.md

@@ -6,6 +6,19 @@ in a kustomization git repository and have `kustomize` decrypt them at build tim
 The `age.key` file is here for the demo, in real life it __SHOULD ABSOLUTELY NOT__ be
 checked in the repository otherwise all secrecy purposes would be defeated.
 
+By default `kustomize` and `age` look for ssh keys to use as identities in `~/.ssh/id_rsa` and `~/.ssh/id_ed25519`.
+If those files exists kustomize will try to use them to decrypt data so you don't need to specify anything in `ageIdentities`
+if the data have been encrypted with one of these keys' public key.
+
+## Binaries
+
+You'll find binaries of age with YAML support and kustomize with age support at https://github.com/sylr/kustomize-age/releases.
+
+## Pull requests
+
+- https://github.com/FiloSottile/age/pull/162
+- https://github.com/kubernetes-sigs/kustomize/pull/3313
+
 ## Kustomization
 
 ```yaml
@@ -22,7 +35,7 @@ configMapGenerator:
 
 ## Build
 ```shell
-$ bin/kustomize-v3.8.7-162-gd5c7bf48-$(go env GOOS)-$(go env GOARCH) build .
+$ kustomize-$(go env GOOS)-$(go env GOARCH)-xxxxxxxx build .
 apiVersion: v1
 data:
   config.yaml: |