rig updates

rig/docs/graphs/02-environment.dot

@@ -32,7 +32,7 @@ digraph rig_environment {
         fontcolor="#8892a8"
 
         versions [label="versions.env\npinned toolchain" fillcolor="#121829"]
-        profile  [label="env.d/<profile>.env\nnodes · CNI · audit · addons" fillcolor="#121829"]
+        profile  [label="env.d/<profile>.env\noptional: addons · registry" fillcolor="#121829"]
         localenv [label="ctrl/.env\nsecrets, overrides" fillcolor="#121829"]
         shell    [label="the environment\nPROFILE=client make …" fillcolor="#1a3a1a" fontcolor="#00c853"]
     }

rig/docs/graphs/02-environment.svg

@@ -122,7 +122,7 @@
 <title>profile</title>
 <polygon fill="#121829" stroke="#1e2a4a" points="781.5,-318.58 612.5,-318.58 612.5,-282.58 781.5,-282.58 781.5,-318.58"/>
 <text xml:space="preserve" text-anchor="middle" x="697" y="-303.63" font-family="Helvetica,sans-Serif" font-size="11.00" fill="#e8eaf0">env.d/&lt;profile&gt;.env</text>
-<text xml:space="preserve" text-anchor="middle" x="697" y="-290.13" font-family="Helvetica,sans-Serif" font-size="11.00" fill="#e8eaf0">nodes · CNI · audit · addons</text>
+<text xml:space="preserve" text-anchor="middle" x="697" y="-290.13" font-family="Helvetica,sans-Serif" font-size="11.00" fill="#e8eaf0">optional: addons · registry</text>
 </g>
 <!-- versions&#45;&gt;profile -->
 <g id="edge6" class="edge">