Update App Versions, run by GitHub Actions - Apps updated:

- Unciv-all: 4.10.14 -> 4.10.15

apps/Unciv/install

@@ -1,6 +1,6 @@
 #!/bin/bash
 
-version=4.10.14
+version=4.10.15
 
 ### Make directory ~/Unciv if not available
 mkdir -p $HOME/Unciv || error "Failed to create folder $HOME/Unciv"