[Buildroot] [PATCH] docs/manual: update intro, make gender-neutral

[Thomas Perale]

In reply of:
> Besides just updating a little terminology, remove the awkward
> reference to "his" when referring to developers.
> 
> Signed-off-by: Robert P. J. Day <rpjday at crashcourse.ca>
> 

Applied to 2025.02.x & 2026.05.x. Thanks

> ---
> 
>   just testing if this first patch passes examination.
> 
> diff --git a/docs/manual/introduction.adoc b/docs/manual/introduction.adoc
> index 476aa81edc..1a8cc6d13e 100644
> --- a/docs/manual/introduction.adoc
> +++ b/docs/manual/introduction.adoc
> @@ -16,11 +16,11 @@ filesystem with Buildroot).
> 
>  Buildroot is useful mainly for people working with embedded systems.
>  Embedded systems often use processors that are not the regular x86
> -processors everyone is used to having in his PC. They can be PowerPC
> -processors, MIPS processors, ARM processors, etc.
> +processors developers are used to having in their PCs, including
> +ARM (both 32- and 64-bit), MIPS, PowerPC, RISC-V and more.
> 
>  Buildroot supports numerous processors and their variants; it also
> -comes with default configurations for several boards available
> +comes with default configurations for hundreds of boards available
>  off-the-shelf. Besides this, a number of third-party projects are based on,
>  or develop their BSP footnote:[BSP: Board Support Package] or
>  SDK footnote:[SDK: Software Development Kit] on top of Buildroot.
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