fix: Build from source instructions

The build from source instructions were deprecated since it prints the
available make targets when running `make` whereas, before it built
dagger in dev mode.
Now to build dagger in dev mode, you have to run `make dagger`.
The doc is now up to date with this.

Signed-off-by: Benjamin Reigner <benjamin.reigner@epitech.eu>

docs/1001-install.md

@@ -71,7 +71,7 @@ git clone https://github.com/dagger/dagger.git
 2\. Build the `dagger` binary.
 
 ```shell
-cd dagger; make
+cd dagger; make dagger
 ```
 
 3\. Copy the `dagger` tool to a location listed in your `$PATH`. For example, to copy it to `/usr/local/bin`: