Update error message and coverage

Author: Mrtenz

packages/snaps-rpc-methods/src/endowments/name-lookup.test.ts

@@ -243,7 +243,7 @@ describe('nameLookupCaveatSpecifications', () => {
           value: ['eip155'],
         }),
       ).toThrow(
-        'Assertion failed: At path: 0 -- Expected a Chain ID matching `/^(?<namespace>[-a-z0-9]{3,8}):(?<reference>[-a-zA-Z0-9]{1,32})$/` but received "eip155".',
+        'Assertion failed: At path: 0 -- Expected a value of type `CaipChainId`, but received: `"eip155"`.',
       );
 
       expect(() =>

packages/snaps-utils/coverage.json

@@ -1,6 +1,6 @@
 {
   "branches": 99.74,
-  "functions": 98.95,
+  "functions": 98.92,
   "lines": 99.47,
   "statements": 96.27
 }