fix broken links

Author: Lauren

v2.1/sql-feature-support.md

@@ -135,9 +135,9 @@ table tr td:nth-child(2) {
 -----------|-----------|------|---------
  Common functions | ✓ | Standard | [Functions calls and SQL special forms documentation](scalar-expressions.html#function-calls-and-sql-special-forms)
  Common operators | ✓ | Standard | [Operators documentation](scalar-expressions.html#unary-and-binary-operations)
- `IF`/`CASE`/`NULLIF` | ✓ | Standard | [Conditional expressions documentation](scalar-expressions.html#conditional-expressions-and-boolean-short-circuit-operations)
- `COALESCE`/`IFNULL` | ✓ | Standard | [Conditional expressions documentation](scalar-expressions.html#conditional-expressions-and-boolean-short-circuit-operations)
-`AND`/`OR` | ✓ | Standard | [Conditional expressions documentation](scalar-expressions.html#conditional-expressions-and-boolean-short-circuit-operations)
+ `IF`/`CASE`/`NULLIF` | ✓ | Standard | [Conditional expressions documentation](scalar-expressions.html#conditional-expressions)
+ `COALESCE`/`IFNULL` | ✓ | Standard | [Conditional expressions documentation](scalar-expressions.html#conditional-expressions)
+`AND`/`OR` | ✓ | Standard | [Conditional expressions documentation](scalar-expressions.html#conditional-expressions)
  `LIKE`/`ILIKE`  | ✓ | Standard | [String pattern matching documentation](scalar-expressions.html#string-pattern-matching)
  `SIMILAR TO` | ✓ | Standard | [SQL regexp pattern matching documentation](scalar-expressions.html#string-matching-using-sql-regular-expressions)
  Matching using POSIX regular expressions  | ✓ | Common Extension | [POSIX regexp pattern matching documentation](scalar-expressions.html#string-matching-using-posix-regular-expressions)