Correct toolbox command not found issue

Add solution  mentioned in  containers/toolbox#955. 

Addeed version of meson build as most system package manager (apt) come with older meson version.

install.md

@@ -37,7 +37,7 @@ The following dependencies are required to build it:
 - clang or gcc
 - go
 - go-md2man
-- meson
+- meson >= 0.58.0 (```sudo pip3 install meson``` instead of ```apt install meson```)
 - ninja
 - systemd
 
@@ -49,8 +49,9 @@ It can be built and installed as any other typical Meson-based project:
 [user@hostname toolbox]$ meson setup -Dprofile_dir=/etc/profile.d builddir
 [user@hostname toolbox]$ meson compile -C builddir
 [user@hostname toolbox]$ sudo meson install -C builddir
+[user@hostname toolbox]$ sudo systemd-tmpfiles --create
 ```
 
 Toolbx is written in Go. Consult the [src/go.mod](https://github.com/containers/toolbox/blob/main/src/go.mod) file for a full list of all the Go dependencies.
 
-By default, Toolbx uses Go modules and all the required Go packages are automatically downloaded as part of the build. There's no need to worry about the Go dependencies, unless the build environment doesn't have network access or any such peculiarities.
+By default, Toolbx uses Go modules and all the required Go packages are automatically downloaded as part of the build. There's no need to worry about the Go dependencies, unless the build environment doesn't have network access or any such peculiarities.