Change "Method" to "Internal Method" in headings where appropriate

index.bs

@@ -1739,7 +1739,7 @@ To support obtaining assertions via {{CredentialsContainer/get()|navigator.crede
 </xmp>
 
 
-### Create a New Credential - PublicKeyCredential's <dfn for="PublicKeyCredential" method>[CREATE-METHOD-DEF]</dfn> Method ### {#sctn-createCredential}
+### Create a New Credential - PublicKeyCredential's <dfn for="PublicKeyCredential" method>[CREATE-METHOD-DEF]</dfn> Internal Method ### {#sctn-createCredential}
 
 <div link-for-hint="PublicKeyCredential/[CREATE-METHOD]">
 {{PublicKeyCredential}}'s [=interface object=]'s implementation of the {{Credential/[CREATE-METHOD]}} [=internal method=] [[!CREDENTIAL-MANAGEMENT-1]] allows
@@ -2333,7 +2333,7 @@ Any
 {{CredentialsContainer/get()|navigator.credentials.get()}} operation can be aborted by leveraging the {{AbortController}};
 see [[dom#abortcontroller-api-integration]] for detailed instructions.
 
-#### PublicKeyCredential's <code><dfn for="PublicKeyCredential" method>[DISCOVER-METHOD-DEF]</dfn></code> Method #### {#sctn-discover-from-external-source}
+#### PublicKeyCredential's <code><dfn for="PublicKeyCredential" method>[DISCOVER-METHOD-DEF]</dfn></code> Internal Method #### {#sctn-discover-from-external-source}
 
 <div link-for-hint="PublicKeyCredential/[DISCOVER-METHOD]">
 
@@ -2855,7 +2855,7 @@ The following [=simple exceptions=] can be raised:
 
 </dl>
 
-### Store an Existing Credential - PublicKeyCredential's `[[Store]](credential, sameOriginWithAncestors)` Method ### {#sctn-storeCredential}
+### Store an Existing Credential - PublicKeyCredential's `[[Store]](credential, sameOriginWithAncestors)` Internal Method ### {#sctn-storeCredential}
 
 <div link-for-hint="PublicKeyCredential/[[Store]](credential, sameOriginWithAncestors)">