Fix bitrotted versions in gh ci

Signed-off-by: Kristoffer Dalby <kristoffer@tailscale.com>

.github/workflows/test.yml

@@ -7,13 +7,13 @@ jobs:
     runs-on: ubuntu-latest
 
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3
         with:
           fetch-depth: 2
 
       - name: Get changed files
         id: changed-files
-        uses: tj-actions/changed-files@v14.1
+        uses: tj-actions/changed-files@v34
         with:
           files: |
             *.nix