fix: update python.html deps — secp256k1 → cryptography

Author: vveerrgg

docs/python.html

@@ -419,7 +419,7 @@ <h2>Install</h2>
             <div class="install-box">
                 <code>pip install nostrkey</code>
             </div>
-            <p style="font-size: 0.875rem; color: var(--text-muted);">Requires Python 3.10 or later. Dependencies: <code>secp256k1</code>, <code>websockets</code>, <code>bech32</code>.</p>
+            <p style="font-size: 0.875rem; color: var(--text-muted);">Requires Python 3.10 – 3.14. Dependencies: <code>cryptography</code>, <code>websockets</code>, <code>bech32</code>. No C compiler needed.</p>
         </section>
 
         <!-- Quick Start -->