chore(readme): add update info

Author: ndavd

README.md

@@ -1,22 +1,32 @@
 # agevault
 
-`agevault` is a directory encryption tool using [age](https://github.com/FiloSottile/age) file encryption.
+`agevault` is a directory encryption tool using
+[age](https://github.com/FiloSottile/age) file encryption.
 
 It locks/unlocks a vault (directory) with a passphrase-protected identity file.
 
-Like age, it features no config options, allowing for a straightforward secure flow.
+Like age, it features no config options, allowing for a straightforward secure
+flow.
 
 ## Disclaimer
 
-**Use it at your own risk!** (see [LICENSE](https://github.com/ndavd/agevault/blob/main/LICENSE))
+**Use it at your own risk!** (see
+[LICENSE](https://github.com/ndavd/agevault/blob/main/LICENSE))
 
-Also, this is a project in early-development and hasn't been thoroughly tested. So far, I've tested it on Linux.
+Also, this is a project in early-development and hasn't been thoroughly tested.
+So far, I've tested it on Linux.
 
 ## Installation
 
-Download the pre-build binaries from the [latest release](https://github.com/ndavd/agevault/releases/latest).
+Always install the latest release to make sure you have the latest security
+improvements and fixes. If the update has the same major version (e.g.
+`v1.x.x`), then it's guaranteed to be backwards compatible.
+
+Download the pre-built binaries from the
+[latest release](https://github.com/ndavd/agevault/releases/latest).
 
 Or using `go`:
+
 ```
 $ go install github.com/ndavd/agevault@latest
 ```
@@ -29,22 +39,29 @@ usage: agevault [vault-name] lock|unlock|keygen
 ```
 
 Securing `my-vault/`:
+
 1. Generate identity file
+
 ```
 $ agevault my-vault keygen
 create identity passphrase: 
 confirm identity passphrase: 
 .age14tpkpl6vexufah8eq5dgrd5zy4xqs4slynh26j5n7gvxs87xhguqwu9zqc.my-vault.key.age CREATED (do not change the filename)
 ```
+
 2. Lock vault
+
 ```
 $ agevault my-vault lock
 my-vault SECURED with age14tpkpl6vexufah8eq5dgrd5zy4xqs4slynh26j5n7gvxs87xhguqwu9zqc
 ```
+
 3. Unlock vault
+
 ```
 $ agevault my-vault unlock
 enter passphrase for identity file ".age14tpkpl6vexufah8eq5dgrd5zy4xqs4slynh26j5n7gvxs87xhguqwu9zqc.my-vault.key.age": 
 my-vault DECRYPTED
 ```
+
 4. That's it. Do your changes, lock it again, etc.