Fix string-match arm in proc filter

When using bw cli my out put is `? Master password: [input is hidden]`
followed by some random characters insted of just `? Master password:`.

This commit makes the string-match work with the output of my version of
`bw` by also beeing compatible with the old format.

May be too broad though

bitwarden.el

@@ -157,7 +157,7 @@ If PRINT-MESSAGE is set then messages are printed to minibuffer."
       (process-send-string proc (concat bitwarden-user "\n"))))
 
   ;; read master password
-  (when (string-match "^? Master password:" string)
+  (when (string-match "^? Master password:.*" string)
     (process-send-string
      proc (concat (read-passwd "Bitwarden master password: ") "\n")))