fix: added missing quote in prover query (#3347)

Author: ischasny

prover/crates/lib/prover_dal/src/fri_witness_generator_dal.rs

@@ -1237,7 +1237,7 @@ impl FriWitnessGeneratorDal<'_, '_> {
                 updated_at = NOW()
             WHERE
                 {job_id_column} = {job_id}
-                AND status != 'successful
+                AND status != 'successful'
             "#,
         );