git_auto_update: update.sh: Fixed quoting of used variables

roles/git_auto_update/templates/update.sh

@@ -1,11 +1,11 @@
 #!/bin/bash
 
-readonly REPO="{{ repo }}";
+readonly REPO={{ repo | quote }};
-readonly DEST="{{ dest }}";
+readonly DEST={{ dest | quote }};
-readonly DEST_USER="{{ owner }}";
+readonly DEST_USER={{ owner | quote }};
-readonly DEST_GROUP="{{ group }}";
+readonly DEST_GROUP={{ group | quote }};
-readonly PREFIX="{{ tag_prefix }}";
+readonly PREFIX={{ tag_prefix | quote }};
-readonly GPG_FINGERPRINT="{{ gpg_fingerprint }}";
+readonly GPG_FINGERPRINT={{ gpg_fingerprint | quote }};
 
 set -e;