Update Eleventy versions in CI

Previously, they were ["latest", "beta"], which were 1.0.x and
2.0.0-beta.x.
Now, Eleventy 3 is in beta, and the meaning of ["latest", "beta"] has
been changed.
Therefore, they needed be changed to keep the original meaning (Eleventy
1 and 2).

.github/workflows/ci.yml

@@ -21,7 +21,7 @@ jobs:
       matrix:
         os: ["ubuntu-latest", "macos-latest", "windows-latest"]
         node: ["18", "20", "22"]
-        tag: ["latest", "beta"]
+        tag: ["1.0.2", "latest"]
     name: Node.js ${{ matrix.node }} on ${{ matrix.os }} against @11ty/eleventy@${{ matrix.tag }}
     steps:
       - uses: actions/checkout@v3