Fix '#' in shell content

Author: idillon-sfl

src/scanner.c

@@ -309,7 +309,7 @@ bool tree_sitter_bitbake_external_scanner_scan(void *payload, TSLexer *lexer, co
         } else if (lexer->lookahead == '\t') {
             indent_length += 8;
             skip(lexer);
-        } else if (lexer->lookahead == '#') {
+        } else if (lexer->lookahead == '#' && !valid_symbols[SHELL_CONTENT]) {
             // If we haven't found an EOL yet,
             // then this is a comment after an expression:
             //   foo = bar # comment