Token permissions fix (#3958)

Ticket 143131

Author: Wovchena

.github/workflows/accuracy_checker.yml

@@ -1,5 +1,6 @@
 name: github-actions
 on: pull_request
+permissions: read-all  # https://github.com/ossf/scorecard/blob/e23b8ad91fd6a64a0a971ca4fc0a4d1650725615/docs/checks.md#token-permissions
 jobs:
   accuracy_checker:
     strategy:

.github/workflows/cpp_gapi-demos.yml

@@ -3,6 +3,7 @@ on:
   pull_request: null
   schedule:
     - cron:  '00 3 * * *'  # Run every day at 3:00 to regenerate cache
+permissions: read-all  # https://github.com/ossf/scorecard/blob/e23b8ad91fd6a64a0a971ca4fc0a4d1650725615/docs/checks.md#token-permissions
 jobs:
   cpp_gapi-demos:
     runs-on: ubuntu-20.04

.github/workflows/model_api.yml

@@ -1,5 +1,6 @@
 name: model_api-github-actions
 on: pull_request
+permissions: read-all  # Required by https://github.com/ossf/scorecard/blob/e23b8ad91fd6a64a0a971ca4fc0a4d1650725615/docs/checks.md#token-permissions
 jobs:
   model_api-github-actions:
     strategy: