Bump version to 28.7

ejurgensen · ejurgensen · commit 9b190dcc2e18 · 2023-08-28T23:20:53.000+02:00
diff --git a/configure.ac b/configure.ac
@@ -1,7 +1,7 @@
 dnl Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.60])
-AC_INIT([owntone], [28.6])
+AC_INIT([owntone], [28.7])
 
 AC_CONFIG_SRCDIR([config.h.in])
 AC_CONFIG_MACRO_DIR([m4])
