Add news for last releases of fmr and cppdiodon

content/news/2023_06_09_cppdiodon-0.2.md

+Title: Cppdiodon 0.2
+date: 2023-06-09 12:00
+Category: News
+author: Florent Pruvost
+
+New release of [Cppdiodon 0.2](https://gitlab.inria.fr/diodon/cppdiodon/-/releases/0.2) is out !
+Check the [documentation](https://diodon.gitlabpages.inria.fr/cppdiodon/index.html) to see how to install it with CMake.
+
+ - [GNU Guix packages](https://gitlab.inria.fr/guix-hpc/guix-hpc) and [non-free channel](https://gitlab.inria.fr/guix-hpc/guix-hpc-non-free)
+
+Add the following in `~/.config/guix/channels.scm`
+```
+(cons (channel
+        (name 'guix-hpc-non-free)
+        (url "https://gitlab.inria.fr/guix-hpc/guix-hpc-non-free.git"))
+      %default-channels)
+```
+
+Install command
+```sh
+guix pull
+guix install cppdiodon
+guix install cppdiodon-mpi
+guix install cppdiodon-chameleon-wompi
+```

content/news/2023_06_12_fmr-0.1.md

+Title: Fmr 0.1
+date: 2023-06-12 12:00
+Category: News
+author: Florent Pruvost
+
+New release of [Fmr 0.1](https://gitlab.inria.fr/compose/legacystack/fmr/-/releases/0.1) is out !
+Check the [documentation](https://gitlab.inria.fr/compose/legacystack/fmr/-/blob/master/README.md) to see how to install it with CMake.
+
+ - [GNU Guix packages](https://gitlab.inria.fr/guix-hpc/guix-hpc) and [non-free channel](https://gitlab.inria.fr/guix-hpc/guix-hpc-non-free)
+
+Add the following in `~/.config/guix/channels.scm`
+```
+(cons (channel
+        (name 'guix-hpc-non-free)
+        (url "https://gitlab.inria.fr/guix-hpc/guix-hpc-non-free.git"))
+      %default-channels)
+```
+
+Install command
+```sh
+guix pull
+guix install fmr
+guix install fmr-mpi
+guix install fmr-chameleon-wompi
+```