Update gitignore to properly ignore external examples pulled down by fetch-readme script

Author: crandmck

.gitignore

@@ -8,8 +8,8 @@
 .docusaurus
 .cache-loader
 /docs/js-sdk/api
-/docs/examples/quickstart/*
-/docs/examples/view-manifest/*
+/docs/js-sdk/examples/*
+/docs/js-sdk/examples/*
 /docs/c2patool/*.md
 /docs/c2patool/docs/*.md
 /docs/c2pa-node/*.md