Repository navigation

fix: recognize a closing code fence at the end of input #172

Job	Run time
Validate queries (markdown-inline)	9s
Test parsers (ubuntu-latest)	19s
Test parsers (macos-latest)	26s
Fuzz parsers (tree-sitter-markdown-inline)	6s
Fuzz parsers (tree-sitter-markdown)	1m 19s
Test parsers (windows-latest)	43s
Validate queries (markdown)	12s
	3m 14s