Fix releases process (#68)

The previous commit did not fix the releases process, as there were
still some GitHub Actions dependencies which needed to be updated.
Updated the dependencies in this commit.

.github/workflows/github_tag_and_release.yml

@@ -27,12 +27,12 @@ jobs:
     steps:
       -
         name: Checkout
-        uses: actions/[email protected].2
+        uses: actions/[email protected].4
         with:
           fetch-depth: 0
       -
         name: Set up Go
-        uses: actions/[email protected].2
+        uses: actions/[email protected].3
         with:
           go-version: 1.15
       -