Update portal.properties (#29702)

comment on the pw regex needs an update

### Proposed Changes
* change 1
* change 2

### Checklist
- [ ] Tests
- [ ] Translations
- [ ] Security Implications Contemplated (add notes if applicable)

### Additional Info
** any additional useful context or info **

### Screenshots
Original             |  Updated
:-------------------------:|:-------------------------:
** original screenshot **  |  ** updated screenshot **

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Co-authored-by: erickgonzalez <[email protected]>

dotCMS/src/main/resources/portal.properties

@@ -305,7 +305,14 @@
     # Note that \ is replaced with \\ to work in Java.
     #
 
-    # This pattern ensures that passwords must have at least 6 characters and no white spaces.
+    # This pattern below ensures that passwords must have at least 8 characters and no white spaces.
+    #	Only the specified characters are allowed:
+    #   	1. Uppercase letters: A-Z
+    #		2. Lowercase letters: a-z
+    #		3. Digits: 0-9
+    #           4. Special characters: ! # % + : = ? @
+    # 		5. No white spaces or other characters not included in the specified set.
+    # The entire password must consist exclusively of the allowed characters from the start (^) to the end ($) of the string.
     passwords.regexptoolkit.pattern=/^[!#%+1234567890:=?@ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz]{8,}$/
 
     # This pattern ensures that passwords must have between 6 and 20 valid