ci: Fetch tags while building so the binaries know

We weren't compiling with tags, causing the version command to just
return the git commit hash, rather than a valid version string.

.github/workflows/ci.yaml

@@ -32,6 +32,7 @@ jobs:
         with:
           ref: ${{ github.event.pull_request.head.sha }}
           fetch-depth: 0
+          fetch-tags: true
 
       - name: Rebase
         # We can't rebase if we're on master already.
@@ -94,6 +95,9 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v3
+        with:
+          fetch-depth: 0
+          fetch-tags: true
 
       - name: Set up Python 3.8
         uses: actions/setup-python@v4