Use indefinite article for JupyterLab

Author: ivanov

index.html

@@ -58,7 +58,7 @@ <h4 class="jumbotron-text">Project Jupyter develops open-source software, open s
                         <img class="img-responsive" src="assets/labpreview.png" id="portal" alt="examples of jupyterlab workspaces in single document and multiple document workspaces"/>
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-                        <h3>JupyterLab: The Next-Generation Notebook Interface</h3>
+                        <h3>JupyterLab: A Next-Generation Notebook Interface</h3>
                         <h4 class="nb-desc">JupyterLab is a web-based interactive development environment for notebooks, code and data. Its flexible interface allows users to configure and arrange workflows in data science, scientific computing, computational journalism and machine learning. A modular design allows for extensions that expand and enrich functionality.</h4>
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                             <a class="orange-button" href="try">Try it in your browser</a>