fix arch names in cfg pretty printer

(cherry picked from commit 05081b96c9)

src/librustdoc/clean/cfg.rs

@@ -545,15 +545,15 @@ fn human_readable_target_arch(os: Symbol) -> Option<&'static str> {
     Some(match arch {
         // tidy-alphabetical-start
         AArch64 => "AArch64",
-        AmdGpu => "AMG GPU",
+        AmdGpu => "AMD GPU",
         Arm => "ARM",
         Arm64EC => "ARM64EC",
         Avr => "AVR",
         Bpf => "BPF",
         CSky => "C-SKY",
         Hexagon => "Hexagon",
-        LoongArch32 => "LoongArch64",
-        LoongArch64 => "LoongArch32",
+        LoongArch32 => "LoongArch32",
+        LoongArch64 => "LoongArch64",
         M68k => "Motorola 680x0",
         Mips => "MIPS",
         Mips32r6 => "MIPS release 6",

tests/rustdoc-html/doc-cfg/all-targets.rs

@@ -32,8 +32,8 @@ pub fn foo() {}
 
 //@ has all_targets/fn.bar.html \
 //  '//*[@id="main-content"]/*[@class="item-info"]/*[@class="stab portability"]' \
-//  'Available on AArch64 or AMG GPU or ARM or ARM64EC or AVR or BPF or C-SKY or \
-//  Hexagon or LoongArch64 or LoongArch32 or Motorola 680x0 or MIPS or MIPS release \
+//  'Available on AArch64 or AMD GPU or ARM or ARM64EC or AVR or BPF or C-SKY or \
+//  Hexagon or LoongArch32 or LoongArch64 or Motorola 680x0 or MIPS or MIPS release \
 //  6 or MIPS-64 or MIPS-64 release 6 or MSP430 or NVidia GPU or PowerPC or \
 //  PowerPC64 or RISC-V RV32 or RISC-V RV64 or s390x or SPARC or SPARC-64 or SPIR-V \
 //  or WebAssembly or WebAssembly or x86 or x86-64 or Xtensa or \