Fix indentation of step to invoke authenticatorMakeCredential

The current indentation renders this step as a sub-step of "For each credential
descriptor C in pkOptions.excludeCredentials", meaning the operation is to be
invoked once per `excludeCredentials` entry and not at all if
`excludeCredentials` is empty. The indentation appears to have been broken in
commit b44009c (originally
7acc1d5) in PR #1366, caused by a mix of tab
and space characters being replaced with just spaces.

index.bs

@@ -2053,24 +2053,23 @@ a numbered step. If outdented, it (today) is rendered as a bullet in the midst o
 
                     1. Otherwise, [=list/Append=] |C| to |excludeCredentialDescriptorList|.
 
-                    <!-- Note: this next step is actually a step on the same level as the above, but bikeshed wanted it indented this much
-                    in order to render it as a numbered step. If outdented, it (today) is rendered either as a bullet in the midst
-                    of a numbered list or is mis-numbered -->
-                        <li id='CreateCred-InvokeAuthnrMakeCred'>
-
-                            <!-- @@EDITOR-ANCHOR-01: KEEP THIS LIST SYNC'D WITH OTHER LOCATIONS WITH THIS TAG -->
-                            Invoke the [=authenticatorMakeCredential=] operation on |authenticator| with
-                                |clientDataHash|,
-                                <code>|pkOptions|.{{PublicKeyCredentialCreationOptions/rp}}</code>,
-                                <code>|pkOptions|.{{PublicKeyCredentialCreationOptions/user}}</code>,
-                                |requireResidentKey|,
-                                |userVerification|,
-                                |credTypesAndPubKeyAlgs|,
-                                |excludeCredentialDescriptorList|,
-                                |enterpriseAttestationPossible|,
-                                |attestationFormats|,
-                                and |authenticatorExtensions| as parameters.
-                        </li>
+                <!-- Note: this next step is actually a step on the same level as the above, but bikeshed wanted it indented this much
+                in order to render it as a numbered step. If outdented, it (today) is rendered either as a bullet in the midst
+                of a numbered list or is mis-numbered -->
+                    <li id='CreateCred-InvokeAuthnrMakeCred'>
+                        <!-- @@EDITOR-ANCHOR-01: KEEP THIS LIST SYNC'D WITH OTHER LOCATIONS WITH THIS TAG -->
+                        Invoke the [=authenticatorMakeCredential=] operation on |authenticator| with
+                            |clientDataHash|,
+                            <code>|pkOptions|.{{PublicKeyCredentialCreationOptions/rp}}</code>,
+                            <code>|pkOptions|.{{PublicKeyCredentialCreationOptions/user}}</code>,
+                            |requireResidentKey|,
+                            |userVerification|,
+                            |credTypesAndPubKeyAlgs|,
+                            |excludeCredentialDescriptorList|,
+                            |enterpriseAttestationPossible|,
+                            |attestationFormats|,
+                            and |authenticatorExtensions| as parameters.
+                    </li>
 
                 1. [=set/Append=] |authenticator| to |issuedRequests|.