vim-patch:9.1.1709: filetype: kyaml files are not recognized

Problem:  filetype: kyaml files are not recognized
Solution: Detect *.kyml files as yaml filetype
          (Volodymyr Chernetskyi)

References:
- https://kubernetes.io/blog/2025/08/27/kubernetes-v1-34-release/#alpha-support-for-kyaml-a-kubernetes-dialect-of-yaml

closes: vim/vim#18158

d5c89cc6bb

Co-authored-by: Volodymyr Chernetskyi <19735328+chernetskyi@users.noreply.github.com>

runtime/lua/vim/filetype.lua

@@ -1392,6 +1392,8 @@ local extension = {
   yaml = 'yaml',
   eyaml = 'yaml',
   mplstyle = 'yaml',
+  kyaml = 'yaml',
+  kyml = 'yaml',
   grc = detect_line1('<%?xml', 'xml', 'yaml'),
   yang = 'yang',
   yuck = 'yuck',