Documentation: Add missing image for mastodon contact

doc/chm/en/VeraCrypt.hhp

@@ -100,6 +100,7 @@ liberapay_donate.svg
 LTC_Logo_30x30.png
 Main Program Window.html
 Malware.html
+mastodon_veracrypt.PNG
 Memory Dump Files.html
 Miscellaneous.html
 Modes of Operation.html

doc/chm/ru/VeraCrypt.ru.hhp

@@ -100,6 +100,7 @@ liberapay_donate.svg
 LTC_Logo_30x30.png
 Main Program Window.html
 Malware.html
+mastodon_veracrypt.PNG
 Memory Dump Files.html
 Miscellaneous.html
 Modes of Operation.html

doc/chm/zh-cn/VeraCrypt.zh-cn.hhp

@@ -102,6 +102,7 @@ liberapay_donate.svg
 LTC_Logo_30x30.png
 Main Program Window.html
 Malware.html
+mastodon_veracrypt.PNG
 Memory Dump Files.html
 Miscellaneous.html
 Modes of Operation.html

doc/html/ru/Contact.html

@@ -46,6 +46,7 @@
 <p>
 Кроме того, мы есть в соцсетях:<br>
 <a title="VeraCrypt on Twitter" href="https://twitter.com/VeraCrypt_IDRIX" target="_blank"><img src="twitter_veracrypt.PNG" alt="VeraCrypt on Twitter" width="168" height="28"></a>&nbsp;&nbsp;
+<a rel="me" title="VeraCrypt on Mastodon" href="https://mastodon.social/@veracrypt" target="_blank"><img src="mastodon_veracrypt.PNG" alt="VeraCrypt on Mastodon" width="69" height="28"></a>&nbsp;&nbsp;
 <a title="VeraCrypt on Facebook" href="https://www.facebook.com/veracrypt" target="_blank"><img src="Home_facebook_veracrypt.png" alt="VeraCrypt on Facebook" width="61" height="28"></a>&nbsp;&nbsp;
 <a title="VeraCrypt on Reddit" href="https://www.reddit.com/r/VeraCrypt/" target="_blank"><img src="Home_reddit.png" alt="VeraCrypt on Reddit" width="94" height="28"></a>
 </p>

doc/html/zh-cn/Contact.html

@@ -39,13 +39,14 @@
 您也可以使用veracrypt [at] amcrypto dot jp这个地址，该地址关联了VeraCrypt团队的PGP密钥。<em style="text-align:left"><br>
 </em></div>
 <div style="text-align:left; margin-top:19px; margin-bottom:19px; padding-top:0px; padding-bottom:0px">
-若要直接联系IDRIX，您可以使用 <a href="https://amcrypto.jp/#contact" target="_blank">
+若要直接联系AM CRYPTO，您可以使用 <a href="https://amcrypto.jp/#contact" target="_blank">
 我们的联系表单</a>。</div>
 </div>
 <div>
 <p>
 我们也活跃于社交媒体：<br>
 <a title="VeraCrypt在Twitter上" href="https://twitter.com/VeraCrypt_IDRIX" target="_blank"><img src="twitter_veracrypt.PNG" alt="VeraCrypt在Twitter上" width="168" height="28"></a>&nbsp;&nbsp;
+<a rel="me" title="VeraCrypt on Mastodon" href="https://mastodon.social/@veracrypt" target="_blank"><img src="mastodon_veracrypt.PNG" alt="VeraCrypt on Mastodon" width="69" height="28"></a>&nbsp;&nbsp;
 <a title="VeraCrypt在Facebook上" href="https://www.facebook.com/veracrypt" target="_blank"><img src="Home_facebook_veracrypt.png" alt="VeraCrypt在Facebook上" width="61" height="28"></a>&nbsp;&nbsp;
 <a title="VeraCrypt在Reddit上" href="https://www.reddit.com/r/VeraCrypt/" target="_blank"><img src="Home_reddit.png" alt="VeraCrypt在Reddit上" width="94" height="28"></a>
 </p>