fix(pom): update geotools repo URL

On April 11, 2020, the geotools repo changed locations to repo.osgeo.org (see
https://web.archive.org/web/20200413163145/https://www.osgeo.org/foundation-news/new-osgeo-repo/).

pom.xml

@@ -207,8 +207,10 @@
   <repositories>
     <repository>
       <id>osgeo</id>
-      <name>Open Source Geospatial Foundation Repository</name>
-      <url>https://download.osgeo.org/webdav/geotools/</url>
+      <name>OSGeo Release Repository</name>
+      <url>https://repo.osgeo.org/repository/release/</url>
+      <snapshots><enabled>false</enabled></snapshots>
+      <releases><enabled>true</enabled></releases>
     </repository>
     <!--  used for importing java projects from github -->
     <repository>