patch 9.0.1565: json lines files are not recognized

Problem:    Json lines files are not recognized.
Solution:   Add a pattern to detect "jsonl" files. (issue #7520)

runtime/filetype.vim

@@ -1063,6 +1063,9 @@ au BufNewFile,BufRead .jshintrc,.hintrc,.swrc,[jt]sconfig*.json	setf jsonc
 " JSON
 au BufNewFile,BufRead *.json,*.jsonp,*.webmanifest	setf json
 
+" JSON Lines
+au BufNewFile,BufRead *.jsonl			setf jsonl
+
 " Jsonnet
 au BufNewFile,BufRead *.jsonnet,*.libsonnet	setf jsonnet
 

src/testdir/test_filetype.vim

@@ -305,6 +305,7 @@ let s:filename_checks = {
     \ 'json': ['file.json', 'file.jsonp', 'file.json-patch', 'file.webmanifest', 'Pipfile.lock', 'file.ipynb', '.prettierrc', '.firebaserc', '.stylelintrc', 'file.slnf'],
     \ 'json5': ['file.json5'],
     \ 'jsonc': ['file.jsonc', '.babelrc', '.eslintrc', '.jsfmtrc', '.jshintrc', '.hintrc', '.swrc', 'jsconfig.json', 'tsconfig.json', 'tsconfig.test.json', 'tsconfig-test.json'],
+    \ 'jsonl': ['file.jsonl'],
     \ 'jsonnet': ['file.jsonnet', 'file.libsonnet'],
     \ 'jsp': ['file.jsp'],
     \ 'julia': ['file.jl'],

src/version.c

@@ -695,6 +695,8 @@ static char *(features[]) =
 
 static int included_patches[] =
 {   /* Add new patch number below this line */
+/**/
+    1565,
 /**/
     1564,
 /**/