Update obsolete UUID RFC reference (#709)

This PR solves the build error:

LINK ERROR: Obsolete biblio ref: [rfc4122] is replaced by [rfc9562]. Either update the reference, or use [rfc4122 obsolete] if this is an intentionally-obsolete reference.

by replacing referenced to rfc4122 with rfc9562.

index.bs

@@ -921,7 +921,7 @@ given |resource name|:
    "<code>/session/</code>" prefix.
 
 1. If |session id| is not the string representation of a
-   [[!RFC4122|UUID]], return null.
+   [[!RFC9562|UUID]], return null.
 
 1. Return |session id|.
 
@@ -2429,7 +2429,7 @@ To <dfn>await a navigation</dfn> given |context|, |request|, |wait condition|, a
 |history handling| (default: "<code>default</code>") and |ignore cache| (default: false):
 
 1. Let |navigation id| be the string representation of a
-   [[!RFC4122|UUID]] based on truly random, or pseudo-random numbers.
+   [[!RFC9562|UUID]] based on truly random, or pseudo-random numbers.
 
 1. Let |navigable| be the [=/navigable=] whose [=navigable/active
    document=] is |context|'s [=browsing context/active document=].
@@ -5985,7 +5985,7 @@ The <dfn export for=commands>network.addIntercept</dfn> command adds a
 <div algorithm="remote end steps for network.addRequestIntercept">
 The [=remote end steps=] given |session| and |command parameters| are:
 
-1. Let |intercept| be the string representation of a [[!RFC4122|UUID]].
+1. Let |intercept| be the string representation of a [[!RFC9562|UUID]].
 
 1. Let |url patterns| be the <code>urlPatterns</code> field of |command
    parameters| if present, or an empty [=/list=] otherwise.
@@ -6843,7 +6843,7 @@ before any author-defined script have run.
 TODO: Extend this to scripts in other kinds of realms.
 
 A [=BiDi session=] has a <dfn>preload script map</dfn> which is a [=/map=] in
-which the keys are [[!RFC4122|UUID]]s, and the values are [=structs=] with an <a
+which the keys are [[!RFC9562|UUID]]s, and the values are [=structs=] with an <a
 for=struct>item</a> named <code>function declaration</code>, which is a string,
 <code>arguments</code>, <code>contexts</code>, which is a list or null, and an item named <code>sandbox</code> which is a string
 or null.
@@ -8088,7 +8088,7 @@ To <dfn>set internal ids if needed</dfn> given |serialization internal map|,
     1. If |previously serialized remote value| does not have a field
        <code>internalId</code>, run the following steps:
 
-      1. Let |internal id| be the string representation of a [[!RFC4122|UUID]]
+      1. Let |internal id| be the string representation of a [[!RFC9562|UUID]]
          based on truly random, or pseudo-random numbers.
 
       1. Set the <code>internalId</code> field of
@@ -8834,7 +8834,7 @@ The [=remote end steps=] given |session| and |command parameters| are:
 1. Let |sandbox| be the value of the "<code>sandbox</code>" field in |command
    parameters|, if present, or null otherwise.
 
-1. Let |script| be the string representation of a [[!RFC4122|UUID]].
+1. Let |script| be the string representation of a [[!RFC9562|UUID]].
 
 1. Let |preload script map| be |session|'s [=preload script map=].