Fix typos and grammar in blog posts and contribute page

_posts/2015-11-23-roundcube-webmail-1.2-beta-out-now.md

@@ -45,7 +45,7 @@ about the Enigma plugin and how it works.
 Please test your plugins thoroughly and look for deprecation warnings in the logs.
 
 See the complete Changelog at [trac.roundcube.net/wiki/Changelog](http://trac.roundcube.net/wiki/Changelog) 
-and download the new packages from  [roundcube.net/download](https://roundcube.net/download). 
+and download the new packages from [roundcube.net/download](https://roundcube.net/download).
 
 Please note that this is a beta release and we recommend to test it on a
 separate environment. And don't forget to backup your data before installing it.

_posts/2021-12-05-recent-roundcube-docker-builds.md

@@ -26,7 +26,7 @@ file for detailed descriptions of these variables.
 ## Redis support built in
 
 The new images for versions 1.4.12 and 1.5.1 now have the PHP Redis module included
-which allows to configure Redis as caching engine or session storage backend.
+which allows one to configure Redis as caching engine or session storage backend.
 
 ## Image tagging schema
 

_posts/2022-03-06-roundcube-1.6-beta-released.md

@@ -16,7 +16,7 @@ The most noteworthy changes are:
 * SQLite: Use foreign keys, require SQLite >= 3.6.19
 
 Adding support for PHP 8.1 again required some refactoring of the Roundcube codebase
-and removing/replacing now deprecated PHP code. We also used this cleaning efforts
+and removing/replacing now deprecated PHP code. We also used these cleanup efforts
 and simplified Roundcube's config options a bit.
 
 ## Breaking Changes
@@ -36,7 +36,7 @@ The following config options have either been removed or renamed:
     - removed `use_tls` option from `ldap_public` array (use tls:// prefix in `host`)
 4. Managesieve:
     - removed `managesieve_port` option (non-standard port can be set via `managesieve_host`)
-    - removed `managesieve_usetls` option (tls:// prefix in `managesieve_host` have to be used)
+    - removed `managesieve_usetls` option (tls:// prefix in `managesieve_host` has to be used)
 
 If you used the **Larry** or the **Classic** skin in your deployment, you need to install them manually
 as they are no longer part of the release packages. They can easily be installed via Composer:

contribute/index.html

@@ -51,7 +51,7 @@ <h1>How to Contribute</h1>
                 Go to <a href="https://explore.transifex.com/roundcube/" class="rc-icon external-link" target="_blank">transifex.com</a> and register yourself as a Transifex user.
                 In order to start translating, you have to become a member of the translation team for your language.
                 To do so, choose your language from the list and then click "Join team" on the upper right part of the overview page.
-                Your request will be proceeded as fast as possible.</p>
+                Your request will be processed as fast as possible.</p>
             </div>
         </div>
     </div>