typosquat/database: Avoid crates mutation while still borrowed

For some reason the Rust borrow checker is not currently complaining about this, but once the code is migrated to `diesel-async` it starts to fail the build.

Author: Turbo87

src/typosquat/database.rs

@@ -67,7 +67,7 @@ impl TopCrates {
         // term.
         for result in crate_owners::table
             .filter(crate_owners::deleted.eq(false))
-            .filter(crate_owners::crate_id.eq_any(crates.keys().collect::<Vec<_>>()))
+            .filter(crate_owners::crate_id.eq_any(crates.keys().cloned().collect::<Vec<_>>()))
             .select((
                 crate_owners::crate_id,
                 crate_owners::owner_id,