Bump checkout version

Author: MonolithProjects

.github/workflows/monthly_build.yml

@@ -9,7 +9,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
           - name: Checkout
-            uses: actions/checkout@v2
+            uses: actions/checkout@v3
             with:
               ref: master
           - name: Monthly build - latest

.github/workflows/publish.yml

@@ -10,7 +10,7 @@ jobs:
         runs-on: ubuntu-latest
         steps:
           - name: Checkout
-            uses: actions/checkout@v2
+            uses: actions/checkout@v3
           - name: Publish to Registry
             uses: elgohr/Publish-Docker-Github-Action@master
             with:

.github/workflows/test_build.yml

@@ -11,7 +11,7 @@ jobs:
         if: "! contains(github.event.head_commit.message, '[skip-ci]')"
         steps:
           - name: checkout
-            uses: actions/checkout@v2
+            uses: actions/checkout@v3
           - name: hadolint
             uses: brpaz/hadolint-action@master
           - name: build