[Bug] Fix broken variables for database event (#17526)

Fix https://github.com/twentyhq/twenty/issues/17524

Recent update meant to support variable with spaces and dots broken the
database event variables. Inserting a variable `My Name` will be
inserted as `{{trigger.[My Name]}}`

For example, for a database event, we send `trigger.properties.after.id`
instead of `id`.
With the new code, we will consider `properties.after.id` as a variable
to wrap in `[]`, giving `trigger.[properties.after.id]` which cannot be
resolve.

Let's only support variable with spaces. Removing the logic to wrap
variable with dots.

packages/twenty-shared/src/workflow/utils/variable-path.util.ts

@@ -1,6 +1,5 @@
 // Characters that require bracket escaping in variable paths
-// Spaces, dots, and brackets would break the dot-notation parsing
-const SPECIAL_CHARS_REGEX = /[\s.[]/;
+const SPECIAL_CHARS_REGEX = /[\s[]/;
 
 export const needsEscaping = (key: string): boolean =>
   SPECIAL_CHARS_REGEX.test(key);