Update configure to reflect rc2 in the version

Author: BenBE

configure.ac

@@ -6,7 +6,7 @@
 # ----------------------------------------------------------------------
 
 AC_PREREQ([2.69])
-AC_INIT([htop], [3.1.0-rc1], [[email protected]], [], [https://htop.dev/])
+AC_INIT([htop], [3.1.0-rc2], [[email protected]], [], [https://htop.dev/])
 
 AC_CONFIG_SRCDIR([htop.c])
 AC_CONFIG_AUX_DIR([build-aux])