ots privacy section: drop em-dashes

Three — entities in the new privacy copy. Replace with normal
sentence breaks (period or colon) so the text reads cleaner without
typographic dashes.

Author: hans-crypto

frontend/src/app/components/_ordpool/open-timestamps/open-timestamps.component.html

@@ -182,7 +182,7 @@ <h2 class="mt-3">Your privacy is the point</h2>
         <h5>Your file never leaves your browser</h5>
         <p class="text-muted">
           We compute the 32-byte SHA-256 fingerprint locally. Only the hash
-          is ever transmitted &mdash; never the contents, never the filename.
+          is ever transmitted. Never the contents, never the filename.
         </p>
       </div>
       <div class="col-md-4 mb-3">
@@ -196,8 +196,8 @@ <h5>Calendars only see us</h5>
       <div class="col-md-4 mb-3">
         <h5>We don't log who you are</h5>
         <p class="text-muted">
-          Our backend keeps no per-request user data &mdash; no IPs, no
-          hashes, no timestamps in any logfile we control.
+          Our backend keeps no per-request user data: no IPs, no hashes,
+          no timestamps in any logfile we control.
         </p>
       </div>
     </div>
@@ -207,7 +207,7 @@ <h5>We don't log who you are</h5>
         One honest caveat: Cloudflare sits in front of ordpool.space for
         DDoS protection and records standard CDN metadata (your IP, your
         country, the request path). If you don't trust them either, run a
-        VPN on top &mdash; then there's no path back to you.
+        VPN on top. Then there's no path back to you.
       </small>
     </p>
   </section>