Update content of files

data/core.telegram.org/bots.html

@@ -252,7 +252,7 @@
 <p>Telegram bots have a <a href="https://en.wikipedia.org/wiki/Deep_linking">deep linking</a> mechanism, that allows for passing additional parameters to the bot on startup. It could be a command that launches the bot — or an auth token to connect the user&#39;s Telegram account to their account on some external service.</p>
 <p>Each bot has a link that opens a conversation with it in Telegram — <code>https://t.me/&lt;bot username&gt;</code>. You can add the parameters <strong>start</strong> or <strong>startgroup</strong> to this link, with values up to 64 characters long. For example:</p>
 <pre><code>https://t.me/triviabot?startgroup=test</code></pre>
-<p><code>A-Z</code>, <code>a-z</code>, <code>0-9</code>, <code>_</code> and <code>-</code> are allowed. We recommend using <a href="https://en.wikipedia.org/wiki/Base64#URL_applications">base64url</a> to encode parameters with binary and other types of content.</p>
+<p><code>A-Z</code>, <code>a-z</code>, <code>0-9</code>, <code>_</code> and <code>-</code> are allowed. We recommend using <a href="https://en.wikipedia.org/wiki/Base64#The_URL_applications">base64url</a> to encode parameters with binary and other types of content.</p>
 <p>Following a link with the <strong>start</strong> parameter will open a one-on-one conversation with the bot, showing a START button in the place of the input field. If the <strong>startgroup</strong> parameter is used, the user is prompted to select a group to add the bot to. As soon as a user confirms the action (presses the START button in their app or selects a group to add the bot to), your bot will receive a message from that user in this format:</p>
 <pre><code>/start PAYLOAD</code></pre>
 <p><code>PAYLOAD</code> stands for the value of the <strong>start</strong> or <strong>startgroup</strong> parameter that was passed in the link.</p>