Fix nesting of LUCI migration MILO console

BUG=

Change-Id: If0e07f2a53c084f3fdedc5e9b78a76aab5402048
Reviewed-on: https://chromium-review.googlesource.com/953207Reviewed-by: John Budorick <jbudorick@chromium.org>
Commit-Queue: Corentin Wallez <cwallez@chromium.org>
Cr-Commit-Position: refs/heads/master@{#541566}

infra/config/global/luci-milo.cfg

@@ -1623,23 +1623,23 @@ consoles: {
 
   builders: {
     name: "buildbucket/luci.chromium.ci/Win7 (32) Tests"
-    category: "win|release|tester|7"
+    category: "win|release|tester|7|(32)"
     short_name: "ᕕ(ᐛ)ᕗ"
   }
   builders: {
     name: "buildbot/chromium.win/Win7 (32) Tests"
-    category: "win|release|tester|7"
+    category: "win|release|tester|7|(32)"
     short_name: "(ಥ_ಥ)"
   }
 
   builders: {
     name: "buildbucket/luci.chromium.ci/Win7 Tests (1)"
-    category: "win|release|tester|7"
+    category: "win|release|tester|7|(1)"
     short_name: "ᕕ(ᐛ)ᕗ"
   }
   builders: {
     name: "buildbot/chromium.win/Win7 Tests (1)"
-    category: "win|release|tester|7"
+    category: "win|release|tester|7|(1)"
     short_name: "(ಥ_ಥ)"
   }
 
@@ -1762,7 +1762,7 @@ consoles: {
   }
   builders: {
     name: "buildbot/chromium.gpu.fyi/Linux FYI GPU TSAN Release"
-    category: "GPU FYI|LinuxTSAN"
+    category: "GPU FYI|Linux|TSAN"
     short_name: "🦖"
   }
 }