docs: finish the shigola rebrand on the site (MAPCO-11504)

tutorials/shigola-with-mapbox.md

@@ -258,7 +258,7 @@ Together, it all looks like the following:
 
 From here, you should see the road layers populate in red on top of the basemap:
 
-![Map with roads loaded](/images/mapbox-tegola-roads.png "Roads")
+![Map with roads loaded](/images/mapbox-roads.png "Roads")
 
 From here, you can load other layers from the same source.
 Keep in mind that you aren't limited to lines, fills (polygon fills) and points.

tutorials/shigola-with-olms.md

@@ -21,7 +21,7 @@ To get setup for using OLMS you'll need a Shigola source, a Mapbox stylesheet, a
 ### Shigola source
 The first thing you'll need is a Shigola endpoint. You can either set up one locally by following the instructions located in the [Shigola docs](/documentation/getting-started) or you can use an existing endpoint.
 
-For the following example we'll be pulling in data from a Shigola instance hosted at https://tegola-osm-demo.go-spatial.org.
+For the following example we'll be pulling in data from the Tegola demo instance hosted at https://tegola-osm-demo.go-spatial.org.
 
 ### Get a Mapbox stylesheet
 You may either pull a Mapbox stylesheet from Mapbox directly using an API key, you can craft your own, or you may use a stylesheet provided in this repo in the style directory.

tutorials/shigola-with-open-layers.md

@@ -25,8 +25,8 @@ The first thing you'll need is a Shigola endpoint. You can either set up one
 locally by following the instructions located in the [Shigola docs](/documentation/getting-started)
 or you can use an existing endpoint.
 
-For the following example we'll be pulling in data from a Shigola instance
-hosted at https://tegola-osm-demo.go-spatial.org.
+For the following example we'll be pulling in data from the Tegola demo
+instance hosted at https://tegola-osm-demo.go-spatial.org.
 
 ## Set up the HTML