Update git submodules

* Update dictionaries from branch 'master'
  to c51a343b3c4c19e57ef3d9b7ceca94d3d4146dfb
  - Updated the English dictionaries: GB
    
    Change-Id: I7f5a6732dd4f8a8105fbf628e849ce7ec4c93955
    Reviewed-on: https://gerrit.libreoffice.org/c/dictionaries/+/92929
    Tested-by: Andras Timar <andras.timar@collabora.com>
    Reviewed-by: Andras Timar <andras.timar@collabora.com>
    
diff --git a/dictionaries b/dictionaries
index 74d8e82..c51a343 160000
--- a/dictionaries
+++ b/dictionaries
@@ -1 +1 @@
Subproject commit 74d8e826359dbf38224fac1b9c02254b7fe0186a
Subproject commit c51a343b3c4c19e57ef3d9b7ceca94d3d4146dfb