Use the Go minor version for Dependabot updates (#108)

Prior to this commit Dependabot would create a pull request for every
new patch version of Go. In `github_tag_and_release.yml` we only specify
the minor version of Go though, so it is better to have Dependabot only
create pull requests when there is a new minor version.

Author: johnboyes

.github/workflows/dependabot_hack.yml

@@ -27,7 +27,7 @@ jobs:
       - uses: koalaman/[email protected]
 
       # update the version in `github_tag_and_release.yml` manually, too
-      - uses: golang/[email protected].1
+      - uses: golang/[email protected]
 
       # update the variant version in the devcontainer.json manually, too
       # (see ../DEPENDENCIES.md#devcontainer-base-image-version for more info )