[PATCH] docs: powerpc: Add htm.rst to table of contents

These changes fix the following error, which was introduced by commit
ab1456c5 when Documentation/arch/powerpc/htm.rst was added to the
repository without any reference to the document.

Documentation/arch/powerpc/htm.rst: WARNING: document isn't included in any toctree [toc.not_included]

Signed-off-by: Brigham Campbell <redacted>
---
 Documentation/arch/powerpc/index.rst | 1 +
 1 file changed, 1 insertion(+)

diff --git a/Documentation/arch/powerpc/index.rst b/Documentation/arch/powerpc/index.rst
index 0560cbae5fa1..53fc9f89f3e4 100644
--- a/Documentation/arch/powerpc/index.rst
+++ b/Documentation/arch/powerpc/index.rst

@@ -19,6 +19,7 @@ powerpc
     elf_hwcaps
     elfnote
     firmware-assisted-dump
+    htm
     hvcs
     imc
     isa-versions

-- 
2.49.0