Change OH versions from 2.5.0 to 3.1.0 in doc files (openhab#1589)

Signed-off-by: Schrotti <[email protected]>

Author: Rosi2143

developers/buildsystem.md

@@ -38,14 +38,14 @@ These dependencies are embedded in the resulting bundle automatically.
 
 There are two exceptions:
 
-1. Dependencies to other openHAB bundles (e.g. `org.openhab.addons.bundles/org.openhab.binding.bluetooth/2.5.0-SNAPSHOT` or `org.openhab.addons.bundles/org.openhab.transform.map/2.5.0-SNAPSHOT`).
+1. Dependencies to other openHAB bundles (e.g. `org.openhab.addons.bundles/org.openhab.binding.bluetooth/3.1.0-SNAPSHOT` or `org.openhab.addons.bundles/org.openhab.transform.map/3.1.0-SNAPSHOT`).
 1. Bundles that are used by more than one binding (e.g. Netty-bundles like `io.netty/netty-common/4.1.34.Final`).
 
 Dependencies on other openHAB bundles should have the scope `provided`.
 To ensure that they are available at runtime they also need to be added to the `feature.xml`:
 
 ```xml
-  <bundle dependency="true">mvn:org.openhab.addons.bundles/org.openhab.binding.bluetooth/2.5.0-SNAPSHOT</bundle>
+  <bundle dependency="true">mvn:org.openhab.addons.bundles/org.openhab.binding.bluetooth/3.1.0-SNAPSHOT</bundle>
 ```
 
 ### Internal dependency

developers/ide/vscode.md

@@ -39,7 +39,7 @@ The following steps will show you how to setup a specific bundle for development
 
    1. Open console to the bundle location (example: `%BASE%\openhab-addons\bundles\org.openhab.binding.russound`)
    1. `mvn clean install -DskipChecks` in the console to build the bundle
-   1. Should produce a jar file in the 'target' directory of the bundle(example: `%BASE%\openhab-addons\bundles\org.openhab.binding.russound\target\org.openhab.binding.russound-2.5.0-SNAPSHOT.jar`)
+   1. Should produce a jar file in the 'target' directory of the bundle(example: `%BASE%\openhab-addons\bundles\org.openhab.binding.russound\target\org.openhab.binding.russound-3.1.0-SNAPSHOT.jar`)
 
 1. Open VSCode and then open the folder of the bundle.  From VSCode - use `File->Open Folder->choose bundle directory` (example: `%BASE%\openhab-addons\bundles\org.openhab.binding.russound`)