Bump targetSdkVersion to 31

Signed-off-by: tobiasKaminsky <tobias@kaminsky.me>

app/build.gradle

@@ -75,7 +75,7 @@ android {
 
     defaultConfig {
         minSdkVersion 23
-        targetSdkVersion 30
+        targetSdkVersion 31
 
         buildConfigField 'boolean', 'CI', ciBuild.toString()