Fix misspelling

Author: penyuan

README.md

@@ -53,7 +53,7 @@ To that end, the month 18 deliverable for task 2.2 is focused on establishing th
 * Compute indicators for the dashboard derived from the company-community collaboration maturity model under development
 * Validate with OPENNEXT SME partners
 
-There are other excellent open source software for open source project analytics and data visualisation, with [Grimoirelab](https://chaoss.github.io/grimoirelab/) being a prime example. However, the full Grimoirelab pipeline requires a full server stack necessitating advanced skills in heavy-duty (but potentially complicated) web technologies such as [Kibana](https://www.elastic.co/products/kibana) or [Elastiserach](https://www.elastic.co/products/elasticsearch). This project aims to create a lighter, more focused solution needing only the use of Python.
+There are other excellent open source software for open source project analytics and data visualisation, with [Grimoirelab](https://chaoss.github.io/grimoirelab/) being a prime example. However, the full Grimoirelab pipeline requires a full server stack necessitating advanced skills in heavy-duty (but potentially complicated) web technologies such as [Kibana](https://www.elastic.co/products/kibana) or [Elastisearch](https://www.elastic.co/products/elasticsearch). This project aims to create a lighter, more focused solution needing only the use of Python.
 
 This documentation aims to demonstrate practices that facilitate design reuse, including of this repository. In addition to the [Install](#install) and [Usage](#usage) sections that increase reproducibility, [Design notes](#design-notes) and [Future work](#future-work) communicate the thought process and lessons-learned while developing the dashboard. Together, they constitute an intangible body of "know-how" that is very often undocumented. For example, motivations for the internal data model or the approach to compressing data a the end of the section [Internal data structure](#internal-data-structure) which reduces disk usage are of practical benefit. But "snippets" of practical experience like these are seldom recorded.