ci: test against multiple go versions

Several Linux distributions and other open source package managers
build Anubis against Go oldstable. Eventually this will have to expand
to at least what FreeBSD supports. I hope they can bump the versions
of Go as soon as upstream makes new code available.

Signed-off-by: Xe Iaso <me@xeiaso.net>

.github/workflows/go.yml

@@ -12,6 +12,11 @@ permissions:
 
 jobs:
   go_tests:
+    strategy:
+      matrix:
+        go_version:
+          - oldstable
+          - stable
     #runs-on: alrest-techarohq
     runs-on: ubuntu-24.04
     steps:
@@ -26,10 +31,11 @@ jobs:
 
       - uses: actions/setup-node@395ad3262231945c25e8478fd5baf05154b1d79f # v6.1.0
         with:
-          node-version: '24.11.0'
+          node-version: "latest"
+
       - uses: actions/setup-go@4dc6199c7b1a012772edbd06daecab0f50c9053c # v6.1.0
         with:
-          go-version: '1.25.4'
+          go-version: ${{ matrix.go_version }}
 
       - name: Cache playwright binaries
         uses: actions/cache@9255dc7a253b0ccc959486e2bca901246202afeb # v5.0.1