MT#58934 GitHub issue templates: list architectures as reported via `uname -m`

Architectures like amd64, i386,... are reported by
`dpkg --print-architecture`, though we can't rely on those
since we don't have only Debian based systems.
So switch to the actual output, as provided by `uname -m`.

Don't list options alphabetically though, as x86_64 AKA amd64
should be the most common option, and "other" makes sense to
present as last option.

Change-Id: I2d8a39d9807f0134665d25de6d89c22a4141a4f9

.github/ISSUE_TEMPLATE/bug_report.yml

@@ -46,10 +46,10 @@ body:
     attributes:
       label: CPU architecture issue was seen on (see `uname -m`)
       options:
-        - amd64
-        - arm64
-        - armhf
-        - i386
+        - x86_64
+        - aarch64
+        - arm
+        - i686
         - other
     validations:
       required: false