fix: md-lint issues

Author: deepessh

src/pages/get-credential-apikey/index.md

@@ -1,3 +1,5 @@
+# Get API Key Credential
+
 import GetCredentialApiKey from "../credential/GetCredentialApiKey.js";
 
 <GetCredentialApiKey />

src/pages/get-credential-oauth/index.md

@@ -1,3 +1,5 @@
+# Get OAuth S2S Credential
+
 import GetCredentialOAuthS2s from "../credential/GetCredentialOAuthS2s.js"
 
 <GetCredentialOAuthS2s />