chore: typo fixes (#1546)

* chore: fix typos in comments/JSDoc.

* chore: fix typo in internal function name.

* chore: fix typos in test comments/descriptions/variable names.

packages/runtime-core/__tests__/helpers/scopeId.spec.ts

@@ -45,10 +45,10 @@ describe('scopeId runtime support', () => {
         return h('div', this.$slots.default())
       })
     }
-    const withChil2Id = withScopeId('child2')
+    const withChild2Id = withScopeId('child2')
     const Child2 = {
       __scopeId: 'child2',
-      render: withChil2Id(() => h('span'))
+      render: withChild2Id(() => h('span'))
     }
     const App = {
       __scopeId: 'parent',