update link to mcpha-win32

Author: pavel-demin

projects/mcpha/app/index.html

@@ -24,7 +24,7 @@ <h1>Multichannel Pulse Height Analyzer</h1>
 <h2>Getting started with MS Windows</h2>
 <ul>
 <li>Connect a signal source to the IN1 or IN2 connector on the Red Pitaya board.</li>
-<li>Download and unpack the <a href="https://github.com/pavel-demin/red-pitaya-notes/releases/download/20210423/mcpha-win32-20210423.zip">control program</a>.</li>
+<li>Download and unpack the <a href="https://github.com/pavel-demin/red-pitaya-notes/releases/download/20210427/mcpha-win32-20210427.zip">control program</a>.</li>
 <li>Run the control program.</li>
 <li>Type in the IP address of the Red Pitaya board and press Connect button.</li>
 <li>Select Spectrum histogram 1 or Spectrum histogram 2 tab.</li>