_content/doc/go1.26: pre-announce Linux/PPC64 port switching to ELFv2 ABI

As discussed in the proposal golang/go#76244, the Linux/PPC64 port, which
currently uses ELFv1 ABI, will switch to ELFv2 ABI in the next
release, instead of being removed.

Also sort architectures in alphabetical order.

For golang/go#76244.
For golang/go#75005.

Change-Id: I73be5214ec0206cd6031106dbd75ff16effec25c
Reviewed-on: https://go-review.googlesource.com/c/website/+/738120
Reviewed-by: Austin Clements <austin@google.com>
LUCI-TryBot-Result: Go LUCI <golang-scoped@luci-project-accounts.iam.gserviceaccount.com>

_content/doc/go1.26.md

diff --git a/_content/doc/go1.26.md b/_content/doc/go1.26.md
index f43ce02..5b6e48e 100644
--- a/_content/doc/go1.26.md
+++ b/_content/doc/go1.26.md
@@ -710,15 +710,11 @@
 
 <!-- go.dev/issue/76244 -->
 
-Go 1.26 is the last release that supports the big-endian 64-bit PowerPC
-port on Linux (`GOOS=linux` `GOARCH=ppc64`).
-The port will be removed in Go 1.27.
-
-### S390X
-
-<!-- CL 719482 -->
-
-The `s390x` port now supports passing function arguments and results using registers.
+Go 1.26 is the last release that supports the ELFv1 ABI on the big-endian
+64-bit PowerPC port on Linux (`GOOS=linux` `GOARCH=ppc64`).
+It will switch to the ELFv2 ABI in Go 1.27.
+As the port does not currently support linking against other ELF objects,
+we expect this change to be transparent to users.
 
 ### RISC-V
 
@@ -726,6 +722,12 @@
 
 The `linux/riscv64` port now supports the race detector.
 
+### S390X
+
+<!-- CL 719482 -->
+
+The `s390x` port now supports passing function arguments and results using registers.
+
 ### WebAssembly {#wasm}
 
 <!-- CL 707855 -->