[DOCS] Updating Edit Button for articles for master (#25832)

Porting: #25831

Author: sgolebiewski-intel

docs/openvino_sphinx_theme/openvino_sphinx_theme/__init__.py

@@ -22,7 +22,7 @@ def has_github_page():
         return False
 
     def get_edit_url():
-        """Return a URL for an "edit this page" link."""
+        """Return a URL for an "Edit on GitHub" link."""
         doc_context = dict()
         doc_context.update(**context)
 

docs/openvino_sphinx_theme/openvino_sphinx_theme/templates/edit-this-page.html

@@ -3,7 +3,7 @@
 {% set src = sourcename.split('.') %}
 <div class="editthispage">
     <a class='button button-size-m' href="{{ get_edit_url() }}">
-        <i class="fas fa-pencil-alt"></i> {{ _("Edit this page") }}
+        <i class="fas fa-pencil-alt"></i> {{ _("Edit on GitHub") }}
     </a>
 </div>
 {% endif %}