CI: cache-deps: cache successes in the matrix

Before this - whole matrix aborted on 1 build fail in it:
https://github.com/haskell/haskell-language-server/runs/4383942120?check_suite_focus=true

Author: Anton-Latukha

.github/workflows/cache-deps.yml

@@ -27,6 +27,7 @@ jobs:
   deps:
     runs-on: ${{ matrix.os }}
     strategy:
+      fail-fast: false
       matrix:
         ghc: ["9.0.1", '8.10.7', '8.10.6', "8.10.5", "8.8.4", "8.8.3", "8.6.5"]
         os: [ubuntu-latest, macOS-latest, windows-latest]