Disable combobox autocomplete

Squash commits of branch bugfix/doubled_autocomplete:

- Disable combobox autocomplete

- Add changelog entry



Committed-by: Thomas Zerr <thomas.zerr@cloudogu.com>

scm-ui/ui-forms/src/combobox/Combobox.tsx

@@ -158,6 +158,7 @@ function ComboboxComponent<T>(props: ComboboxProps<T>, ref: ForwardedRef<HTMLInp
         id={props.id}
         placeholder={props.placeholder}
         onBlur={props.onBlur}
+        autoComplete="off"
         {...createAttributesForTesting(props.testId)}
       />
       <OptionsWrapper className="is-absolute">{options}</OptionsWrapper>