fdroid: add quotes if version is a number

Change-Id: Iaf5112340f43c4238a426972339929df2652c2b2

fdroidMergeRequest.sh

@@ -44,6 +44,10 @@ cp ${METADATA_FOLDER}/cx.ring.yml ${METADATA_FOLDER}/cx.ring.yml_
 
 head -n -11 ${METADATA_FOLDER}/cx.ring.yml_ > ${METADATA_FOLDER}/cx.ring.yml
 
+if [[ ${versionName} =~ ^[0-9]+$ ]]; then
+   versionName="'${versionName}'"
+fi
+
 echo "  - versionName: ${versionName}
     versionCode: ${versionCode}
     commit: ${commit}