Merge pull request #64496 from Blargian/docs_UTCTimestamp

[Docs] add missing `UTCTimestamp` function

docs/en/sql-reference/functions/date-time-functions.md

@@ -4115,6 +4115,43 @@ Result:
 │                                                 2023-03-16 18:00:00.000 │
 └─────────────────────────────────────────────────────────────────────────┘
 ```
+
+## UTCTimestamp
+
+Returns the current date and time at the moment of query analysis. The function is a constant expression.
+
+:::note
+This function gives the same result that `now('UTC')` would. It was added only for MySQL support and [`now`](#now-now) is the preferred usage.
+:::
+
+**Syntax**
+
+```sql
+UTCTimestamp()
+```
+
+Alias: `UTC_timestamp`.
+
+**Returned value**
+
+- Returns the current date and time at the moment of query analysis. [DateTime](../data-types/datetime.md).
+
+**Example**
+
+Query:
+
+```sql
+SELECT UTCTimestamp();
+```
+
+Result:
+
+```response
+┌──────UTCTimestamp()─┐
+│ 2024-05-28 08:32:09 │
+└─────────────────────┘
+```
+
 ## timeDiff
 
 Returns the difference between two dates or dates with time values. The difference is calculated in units of seconds. It is same as `dateDiff` and was added only for MySQL support. `dateDiff` is preferred.

utils/check-style/aspell-ignore/en/aspell-dict.txt

@@ -2791,6 +2791,7 @@ urls
 usearch
 userspace
 userver
+UTCTimestamp
 utils
 uuid
 uuidv