fix: correct special characters escaping in configuration

- Remove unnecessary quotes around special-chars property value
- Fix escaping for backslash and quotes in allowed special characters
- Ensures proper parsing of special characters configuration

The previous format with surrounding quotes could cause parsing issues
and prevent certain special characters from being recognized.

🤖 Generated with [Claude Code](https://claude.ai/code)

Co-Authored-By: Claude <noreply@anthropic.com>

Author: devondragon

src/main/resources/config/dsspringuserconfig.properties

@@ -111,7 +111,7 @@ user.security.password.require-digit=true
 # Require at least one special character
 user.security.password.require-special=true
 # Allowed special characters
-user.security.password.special-chars="~`!@#$%^&*()_-+={}[]|\\:;\"'<>,.?/"
+user.security.password.special-chars=~`!@#$%^&*()_-+={}[]|\\:;"'<>,.?/
 # Prevent use of common passwords (dictionary check)
 user.security.password.prevent-common-passwords=true
 # Number of previous passwords to prevent reuse