Include lib32-glibc-linux4 in known issues for WSL1

[dbz2k]

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Describe the issue
I haven't used ArchWSL in a couple months, but I notice I was having upgrade issues complaining about lib32-glibc when upgrading so I had to use lib32-glibc-linux4 from the archlinuxcn repo.

This was on a new install.

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Enviroment:

• Windows build number: [e.g. 10.0.17134.228] (Type ver at a Command Prompt)
• Security Software: [e.g. ESET Internet Security]
• WSL version 1/2: [e.g. WSL1]
• ArchWSL version [e.g. 19.3.7.0]
• ArchWSL Installer type zip/appx/other clean/update [e.g. appx update]
• Launcher version [e.g. 19030700] (Type Arch.exe version at a Command Prompt)

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[kotenok2000]

Now i can't even find lib32-glibc-linux4 and glibc-linux4 in repo

[FrankHB]

archlinuxcn/repo#3237

wsldl-pg/ArchW-docs#45

Now even upstream AUR package is outdated...

[viruscamp]

As the maintainer of glibc-linux4 said in [https://aur.archlinux.org/packages/glibc-linux4#comment-930385]

The normal glibc v2.38 works perfectly fine with WSL 1, which is on Linux v4.4.0. There is no need to update & use glibc-linux4 at the moment AFAIK.
If you do need glibc-linux4 v2.38 as normal glibc will not work for you, please be sure to provide the details when you flag this package.

You'd better install official package to replace glibc-linux4 and lib32-glibc-linux4

pacman -S glibc lib32-glibc