Fix typos

Thanks @asymmetric

I failed to do them all in one batch

Co-Authored-By: asymmetric <lorenzo@mailbox.org>

src/libstore/build.cc

@@ -3662,7 +3662,7 @@ void DerivationGoal::registerOutputs()
 
             auto dest = worker.store.makeFixedOutputPath(recursive, h2, i.second.path.name());
 
-            // true if ither floating CA, or incorrect fixed hash.
+            // true if either floating CA, or incorrect fixed hash.
             bool needsMove = true;
 
             if (i.second.hash != "") {

src/libstore/local-store.cc

@@ -559,7 +559,7 @@ void LocalStore::checkDerivationOutputs(const StorePath & drvPath, const Derivat
     };
 
 
-    // Don't need the answer, but do this anways to assert is proper
+    // Don't need the answer, but do this anyways to assert is proper
     // combination. The code below is more general and naturally allows
     // combinations that are currently prohibited.
     drv.type();