configure.ac: bump versions for the 2.10.14 release

3 jobs for GIMP_2_10_14 in 17 minutes and 17 seconds (queued for 2 seconds)
latest
Status Job ID Name Coverage
  Babl
passed #480318
babl-git

00:02:43

 
  Gegl
passed #480319
gegl-git

00:05:13

 
  Gimp
passed #480320
build-git-autotools

00:09:20