[RELEASE] use 0.0-test instead of forgejo-test

so that it is a valid semver version instead of not

.forgejo/workflows/build-release-integration.yml

@@ -110,7 +110,7 @@ jobs:
           #
           # Push a commit to a branch that triggers the build of a test release
           #
-          version=forgejo-test
+          version=0.0-test
           (
             git clone $url/root/forgejo /tmp/forgejo
             cd /tmp/forgejo

.forgejo/workflows/build-release.yml

@@ -53,8 +53,12 @@ jobs:
           set -x
           ref="${{ github.ref }}"
           if [[ $ref =~ ^refs/heads/ ]] ; then
-            version=${ref#refs/heads/}
-            version=${version%/forgejo}-test
+            if test "$ref" = "refs/heads/forgejo" ; then
+              version=0.0-test
+            else
+              version=${ref#refs/heads/}
+              version=${version%/forgejo}-test
+            fi
             override=true
           fi
           if [[ $ref =~ ^refs/tags/ ]] ; then