vim-patch:9.0.0808: jsonnet filetype detection has a typo (#20753)

Problem:    jsonnet filetype detection has a typo.
Solution:   Change "libjsonnet" to "libsonnet". (Maxime Brunet, closes vim/vim#11412)
6c8bc37a10

runtime/lua/vim/filetype.lua

@@ -564,7 +564,7 @@ local extension = {
   json5 = 'json5',
   jsonc = 'jsonc',
   jsonnet = 'jsonnet',
-  libjsonnet = 'jsonnet',
+  libsonnet = 'jsonnet',
   jsp = 'jsp',
   jl = 'julia',
   kv = 'kivy',

src/nvim/testdir/test_filetype.vim

@@ -291,7 +291,7 @@ let s:filename_checks = {
     \ 'json': ['file.json', 'file.jsonp', 'file.json-patch', 'file.webmanifest', 'Pipfile.lock', 'file.ipynb', '.babelrc', '.eslintrc', '.prettierrc', '.firebaserc', 'file.slnf'],
     \ 'json5': ['file.json5'],
     \ 'jsonc': ['file.jsonc'],
-    \ 'jsonnet': ['file.jsonnet', 'file.libjsonnet'],
+    \ 'jsonnet': ['file.jsonnet', 'file.libsonnet'],
     \ 'jsp': ['file.jsp'],
     \ 'julia': ['file.jl'],
     \ 'kconfig': ['Kconfig', 'Kconfig.debug', 'Kconfig.file'],