Fixed some more typos in mdui doc

docs/simplesamlphp-metadata-extensions-ui.txt

@@ -11,14 +11,14 @@ SAML V2.0 Metadata Extensions for Login and Discovery User Interface
 
 <!-- {{TOC}} -->
 
-This is a reference for the SimpleSAMLphp implementation of the [SAML
+This is a reference for the simpleSAMLphp implementation of the [SAML
 V2.0 Metadata Extensions for Login and Discovery User Interface](http://docs.oasis-open.org/security/saml/Post2.0/sstc-saml-metadata-ui/v1.0/sstc-saml-metadata-ui-v1.0.pdf)
 defined by OASIS.
 
 The metadata extensions are available to both IdP and SP usage of
 simpleSAMLphp. For an IdP, the entries are placed in
 `metadata/saml20-idp-hosted.php`, for an SP, they are put inside
-the relvant entry in `authsources.php`.
+the relevant entry in `authsources.php`.
 
 An example for an IdP:
 
@@ -120,7 +120,7 @@ using the array key as the language-code:
             ),
 
 `Description`
-:   The localized list of statements used to decribe this entity
+:   The localized list of statements used to describe this entity
 
             'Description' => array(
                 'en' => 'English description',