Update version now that the 2.46 branch has been created

[John David Anglin]

Hi Nick,

I hit the following error building binutils master:

make[4]: Entering directory '/home/dave/gnu/binutils/objdir64/gprof'
  GEN      config.texi
  MAKEINFO gprof.info
gprof.texi:1804: warning: unexpected argument on @ignore line: - it does this now
  CC       basic_blocks.o
In file included from ../../src/gprof/gprof.h:41,
                 from ../../src/gprof/basic_blocks.c:24:
./gconfig.h:122:9: error: ‘VERSION’ redefined [-Werror]
  122 | #define VERSION "2.45.50"
      |         ^~~~~~~
In file included from ../../src/gprof/../bfd/sysdep.h:29,
                 from ../../src/gprof/gprof.h:33:
../bfd/config.h:355:9: note: this is the location of the previous definition
  355 | #define VERSION "2.46.50"
      |         ^~~~~~~
cc1: all warnings being treated as errors
make[4]: *** [Makefile:639: basic_blocks.o] Error 1

Dave
-- 
John David Anglin  dave.anglin@bell.net