ci(fdroid): fix invalid YAML in the submodule-aware checkout steps

The earlier submodule wiring left a mis-indented `with:` / `submodules:
recursive` block under `uses: actions/checkout@v4` (and, in ci.yaml, a second
stray `with:`), which made both workflows fail to parse
("mapping values are not allowed here"). Merge submodules into the single
correctly-indented `with:` block so CI actually checks out floret-kit.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

.gitea/workflows/release.yaml

@@ -33,8 +33,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-          with:
-            submodules: recursive
+        with:
+          submodules: recursive
 
       - name: Resolve version and whether it is a new release
         id: v
@@ -84,8 +84,8 @@ jobs:
     steps:
       - name: Checkout
         uses: actions/checkout@v4
-          with:
-            submodules: recursive
+        with:
+          submodules: recursive
 
       - name: Setup Java
         uses: actions/setup-java@v4