Fix test

Author: soutaro

test/rbs/collection/config_test.rb

@@ -281,9 +281,9 @@ def test_generate_lock_from_collection_with_manifest_yaml
             source:
               type: stdlib
           - name: mutex_m
-            version: "0"
+            version: "0.3.0"
             source:
-              type: stdlib
+              type: rubygems
           - name: singleton
             version: "0"
             source:
@@ -788,9 +788,9 @@ def test_generate_lockfile__dependency_source
             source:
               type: stdlib
           - name: mutex_m
-            version: "0"
+            version: "0.3.0"
             source:
-              type: stdlib
+              type: rubygems
           - name: securerandom
             version: "0"
             source: