try with explicit raw

.github/workflows/trial.yml

@@ -55,7 +55,7 @@ jobs:
         uses: docker/metadata-action@v4
         with:
           images: |
-            cupcakearmy/breitbandbot
+            cupcakearmy/static
             ghcr.io/${{ github.repository }}
           tags: ${{ matrix.tags }}
           sep-tags: ";"

tags/index.js

@@ -23,7 +23,8 @@ const filtered = versions.sort(semver.rcompare).slice(0, 2)
 function convert(version, additional = []) {
   return {
     version,
-    tags: [version, ...additional].join(';'),
+    // https://github.com/docker/metadata-action#typeraw
+    tags: [version, ...additional].map((t) => `type=raw,value=${t}`).join(';'),
   }
 }