chore(deps): pin dependencies (#66)

This PR contains the following updates:

| Package | Type | Update | Change |
|---|---|---|---|
| [actions/env](https://c.csw.im/actions/env) | action | pinDigest |  -> `1791216` |
| [actions/setup-uv](https://c.csw.im/actions/setup-uv) | action | pinDigest |  -> `2269511` |
| catthehacker/ubuntu | container | pinDigest |  -> `70d7485` |

---

### Configuration

📅 **Schedule**: Branch creation - At any time (no schedule defined), Automerge - At any time (no schedule defined).

🚦 **Automerge**: Disabled by config. Please merge this manually once you are satisfied.

♻ **Rebasing**: Whenever PR becomes conflicted, or you tick the rebase/retry checkbox.

👻 **Immortal**: This PR will be recreated if closed unmerged. Get [config help](https://github.com/renovatebot/renovate/discussions) if that's undesired.

---

 - [ ] <!-- rebase-check -->If you want to rebase/retry this PR, check this box

---

This PR has been generated by [Renovate Bot](https://github.com/renovatebot/renovate).
<!--renovate-debug:eyJjcmVhdGVkSW5WZXIiOiIzOS4xNjYuMCIsInVwZGF0ZWRJblZlciI6IjM5LjIxMS4wIiwidGFyZ2V0QnJhbmNoIjoibWFpbiIsImxhYmVscyI6W119-->

Reviewed-on: #66
Co-authored-by: Renovate <renovate@csw.im>
Co-committed-by: Renovate <renovate@csw.im>

.forgejo/workflows/workflow.yaml

@@ -9,13 +9,13 @@ jobs:
   lint:
     name: Lint Code (Ruff & Pylint)
     runs-on: docker
-    container: catthehacker/ubuntu:act-latest
+    container: catthehacker/ubuntu:act-latest@sha256:70d7485966a50a639ddab37445fd27c2f0b5086ad4959ec3bba228ed394c1928
     steps:
       - name: Checkout
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
 
       - name: "Setup uv"
-        uses: actions/setup-uv@v5
+        uses: actions/setup-uv@22695119d769bdb6f7032ad67b9bca0ef8c4a174 # v5
         with:
           version: "latest"
           enable-cache: true
@@ -35,7 +35,7 @@ jobs:
   docs:
     name: Build Documentation (MkDocs)
     runs-on: docker
-    container: catthehacker/ubuntu:act-latest
+    container: catthehacker/ubuntu:act-latest@sha256:70d7485966a50a639ddab37445fd27c2f0b5086ad4959ec3bba228ed394c1928
     steps:
       - name: Checkout
         uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683 # v4
@@ -43,7 +43,7 @@ jobs:
           fetch-depth: 0
 
       - name: "Setup uv"
-        uses: actions/setup-uv@v5
+        uses: actions/setup-uv@22695119d769bdb6f7032ad67b9bca0ef8c4a174 # v5
         with:
           version: "latest"
           enable-cache: true
@@ -54,7 +54,7 @@ jobs:
         run: uv sync --no-dev --group=documentation
 
       - name: Set environment variables
-        uses: actions/env@v2
+        uses: actions/env@1791216cd180e6578dd1d67fb8d2852b883a5f53 # v2
 
       - name: Build documentation
         run: |