doc: Mention ARM executables in release process

Mention ARM executables in the release process documentation
(these were introduced in #8188).
As well as that Linux tarballs have changed name to contain an
architecture tuple, instead of `linux32`/`linux64`.
Also mention that `-debug` files should not be uploaded (these were
introduced in #8167).

doc/release-process.md

@@ -210,8 +210,10 @@ sha256sum * > SHA256SUMS
 
 The list of files should be:
 ```
-bitcoin-${VERSION}-linux32.tar.gz
+bitcoin-${VERSION}-aarch64-linux-gnu.tar.gz
-bitcoin-${VERSION}-linux64.tar.gz
+bitcoin-${VERSION}-arm-linux-gnueabihf.tar.gz
+bitcoin-${VERSION}-i686-pc-linux-gnu.tar.gz
+bitcoin-${VERSION}-x86_64-linux-gnu.tar.gz
 bitcoin-${VERSION}-osx64.tar.gz
 bitcoin-${VERSION}-osx.dmg
 bitcoin-${VERSION}.tar.gz
@@ -220,6 +222,11 @@ bitcoin-${VERSION}-win32.zip
 bitcoin-${VERSION}-win64-setup.exe
 bitcoin-${VERSION}-win64.zip
 ```
+The `*-debug*` files generated by the gitian build contain debug symbols
+for troubleshooting by developers. It is assumed that anyone that is interested
+in debugging can run gitian to generate the files for themselves. To avoid
+end-user confusion about which file to pick, as well as save storage
+space *do not upload these to the bitcoin.org server, nor put them in the torrent*.
 
 - GPG-sign it, delete the unsigned file:
 ```