Bump dotnet-reportgenerator-globaltool from 5.5.4 to 5.5.6 (#388)

---
updated-dependencies:
- dependency-name: dotnet-reportgenerator-globaltool
  dependency-version: 5.5.6
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

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Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Author: dependabot[bot]

.config/dotnet-tools.json

@@ -3,7 +3,7 @@
   "isRoot": true,
   "tools": {
     "dotnet-reportgenerator-globaltool": {
-      "version": "5.5.4",
+      "version": "5.5.6",
       "commands": [
         "reportgenerator"
       ],