Use actions/checkout@v3 (#59)

Author: OskarStark

.github/workflows/update_version.yml

@@ -13,7 +13,7 @@ jobs:
 
         steps:
             - name: "Checkout code"
-              uses: actions/checkout@v2
+              uses: actions/checkout@v3
               with:
                   ref: master
                   fetch-depth: '0'
@@ -66,7 +66,7 @@ jobs:
         if: github.ref == 'refs/heads/master' || github.event_name == 'release'
         steps:
         - name: Checkout
-          uses: actions/checkout@v2
+          uses: actions/checkout@v3
         - name: Docker meta
           id: meta
           uses: crazy-max/ghaction-docker-meta@v2