Replace + with - on gitlab

Due to the issues with using + in the name of packages, like with gtk+2.0,
Apertis decided to replace + by - in several cases, which can be used as
default.

The current code took the approach of escaping the +, but that is not really
needed for the folding/branching process which rely on package names.

Signed-off-by: Walter Lozano <walter.lozano@collabora.com>

release-scripts/gitlab.sh

@@ -23,7 +23,7 @@ api(){
 }
 
 get-id(){
-    echo $1 | sed -e s,/,%2F,g -e s,+,%2B,g
+    echo $1 | sed -e s,/,%2F,g -e s,+,-,g
 }
 
 create-merge-request(){