Fix embedded pdf path to github-account-security.mdx (#328)

Co-authored-by: VishalAbiman05 <s224373871@deakin.edu.au>

Author: inaambaj

docs/company-policy/ISMS/github-account-security.mdx

@@ -5,7 +5,7 @@ sidebar_position: 1
 # GitHub Account Security
 
 <embed
-  src="https://redback-operations.github.io/redback-documentation/static/pdf/github-account-security.pdf"
+  src="/pdf/github-account-security.pdf"
   type="application/pdf"
   width="100%"
   height="800px"