Update README.md

README.md

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 [Mapper4SDG](https://niebert.github.io/Mapper4SDG) is an OpenSource tool developed for creating markers/icons with a info popup for the tagged geolocation on a map. The popup contains information about the [SDG-related activies](https://en.wikiversity.org/wiki/Sustainable_Development_Goals) at the geolocation marked on map with an icon. [Mapper4SDG](https://niebert.github.io/Mapper4SDG) is generated with [OpenLayers](https://www.openlayers.org) and as map source [OpenStreetMap](https://www.openstreetmap.org) was used.
 
-* <font size="+2"><a href="https://niebert.gihub.io/Markers4Map" target="githubdemo">Markers4Map Demo</a></font>
+* <font size="+2"><a href="https://niebert.github.io/Markers4Map" target="githubdemo">Markers4Map Demo</a></font>
 
 The data for the markers, popups for the geolocation are stored in a JSON file and shared with others. Stored JSON data can be loaded from the WebApp [Markers4Map](https://niebert.gihub.io/Markers4Map).
 
 The information about the markers/icons/popups is stored in link/url that can be used e.g. Wikiversity for a specific learning resource.
 
-The documentation for [Markers4Map](https://niebert.gihub.io/Markers4Map) is available in [Wikiversity-Markers4Map](https://en.wikiversity.org/wiki/Markers4Map).
+The documentation for [Markers4Map](https://niebert.github.io/Markers4Map) is available in [Wikiversity-Markers4Map](https://en.wikiversity.org/wiki/Markers4Map).
 
-The WebApp [Markers4Map](https://niebert.gihub.io/Markers4Map) is a [AppLSAC](https://en.wikiversity.org/wiki/AppLSAC) with privacy friendly data management in the browser in mind.
+The WebApp [Markers4Map](https://niebert.github.io/Markers4Map) is a [AppLSAC](https://en.wikiversity.org/wiki/AppLSAC) with privacy friendly data management in the browser in mind.
 
 Display of the markers is performend with the following package:
 * [openlayer_display_markers](https://www.github.com/niebert/openlayer_display_markers) URL: https://www.github.com/niebert/openlayer_display_markers