doc: fix typo in the "Build ACRN from Source" guide

Fixes a small typo. See also projectacrn/projectacrn.github.io#18

Signed-off-by: shrmrf <shrmrf@users.noreply.github.com>

Author: T

doc/getting-started/building-from-source.rst

@@ -68,7 +68,7 @@ each with their own way to install development tools:
      .. code-block:: none
 
         $ wget https://mirrors.ocf.berkeley.edu/gnu/binutils/binutils-2.27.tar.gz
-        $ tar xzvf binutils-2.27 && cd binutils-2.27
+        $ tar xzvf binutils-2.27.tar.gz && cd binutils-2.27
         $ ./configure
         $ make
         $ sudo make install