Merge pull request #2765 from reubenmiller/docs-yocto-file-dep

docs(yocto): add missing build dependency `file`

Author: reubenmiller

docs/src/extend/firmware-management/building-image/yocto/tutorial.md

@@ -29,7 +29,7 @@ Before being able to build your own image, you need to prepare an environment to
 2. Install essential packages
 
     ```sh tab={"label":"Ubuntu-20.04"}
-    sudo apt install gawk wget git diffstat unzip texinfo gcc build-essential chrpath socat cpio python3 python3-pip python3-pexpect xz-utils debianutils iputils-ping python3-git python3-jinja2 libegl1-mesa libsdl1.2-dev pylint3 xterm python3-subunit mesa-common-dev zstd liblz4-tool
+    sudo apt install file gawk wget git diffstat unzip texinfo gcc build-essential chrpath socat cpio python3 python3-pip python3-pexpect xz-utils debianutils iputils-ping python3-git python3-jinja2 libegl1-mesa libsdl1.2-dev pylint3 xterm python3-subunit mesa-common-dev zstd liblz4-tool
     ```
 
 :::note