Update versions of code coverage tooling (#111687)

Author: stephentoub

.config/dotnet-tools.json

@@ -3,13 +3,13 @@
   "isRoot": true,
   "tools": {
     "coverlet.console": {
-      "version": "6.0.0",
+      "version": "6.0.4",
       "commands": [
         "coverlet"
       ]
     },
     "dotnet-reportgenerator-globaltool": {
-      "version": "5.3.0",
+      "version": "5.4.3",
       "commands": [
         "reportgenerator"
       ]