Update get_mog.sh

Fix syntax error next to `then`

Author: Ayehavgunne

get_mog.sh

@@ -1,7 +1,7 @@
 OS=$(uname -s | tr '[:upper:]' '[:lower:]')
 ARCH=$(uname -m | tr '[:upper:]' '[:lower:]')
 
-if [[ "$ARCH" == "x86_64" ]] then
+if [[ "$ARCH" == "x86_64" ]]; then
     ARCH="amd64"
 fi