Bump the determinatesystems-actions group with 2 updates (#134)

Bumps the determinatesystems-actions group with 2 updates: [DeterminateSystems/nix-installer-action](https://github.com/determinatesystems/nix-installer-action) and [DeterminateSystems/magic-nix-cache-action](https://github.com/determinatesystems/magic-nix-cache-action).


Updates `DeterminateSystems/nix-installer-action` from 9 to 10
- [Release notes](https://github.com/determinatesystems/nix-installer-action/releases)
- [Commits](DeterminateSystems/nix-installer-action@v9...v10)

Updates `DeterminateSystems/magic-nix-cache-action` from 3 to 4
- [Release notes](https://github.com/determinatesystems/magic-nix-cache-action/releases)
- [Commits](DeterminateSystems/magic-nix-cache-action@v3...v4)

---
updated-dependencies:
- dependency-name: DeterminateSystems/nix-installer-action
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: determinatesystems-actions
- dependency-name: DeterminateSystems/magic-nix-cache-action
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: determinatesystems-actions
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

.github/workflows/ci-nix.yml

@@ -25,8 +25,8 @@ jobs:
     timeout-minutes: 30
     steps:
       - uses: actions/checkout@v4
-      - uses: DeterminateSystems/nix-installer-action@v9
-      - uses: DeterminateSystems/magic-nix-cache-action@v3
+      - uses: DeterminateSystems/nix-installer-action@v10
+      - uses: DeterminateSystems/magic-nix-cache-action@v4
       - run: nix flake check
       - run: nix develop --command echo 'This step should be done before any other "nix develop" steps because of measuring Nix build time'
       - run: nix develop --command task deps

.github/workflows/reusable-bump-flake-lock-and-selfup.yml

@@ -59,8 +59,8 @@ jobs:
           # Needed to specify token for checkout phase, only in pushing phase is too late
           # https://github.com/orgs/community/discussions/27072#discussioncomment-3254515
           token: ${{ steps.publish-token.outputs.token }}
-      - uses: DeterminateSystems/nix-installer-action@cd46bde16ab981b0a7b2dce0574509104543276e # v9
-      - uses: DeterminateSystems/magic-nix-cache-action@eeabdb06718ac63a7021c6132129679a8e22d0c7 # v3
+      - uses: DeterminateSystems/nix-installer-action@de22e16c4711fca50c816cc9081563429d1cf563 # v10
+      - uses: DeterminateSystems/magic-nix-cache-action@fc6aaceb40b9845a02b91e059ec147e78d1b4e41 # v4
       - name: Fetch active PRs by me
         id: fetch-active-prs
         env: