chore: update GitHub actions

* checkout: v4 -> v6
* setup-python: v4 -> v6
* cache: v4 -> v5
* changed the ruff-action to use astral's official one instead of the
  deprecated chartboost version

Author: jbriones1

.github/workflows/alembic.yml

@@ -21,7 +21,9 @@ jobs:
           POSTGRES_HOST_AUTH_METHOD: trust
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
+        with:
+          fetch-depth: 1
 
       - name: Wait for PostgreSQL to be ready
         run: |
@@ -32,7 +34,6 @@ jobs:
 
       - name: Install dependencies
         run: |
-          # for python3.11 (dear internet gods: we'll update to 3.13 or something in a year, i promise)
           sudo add-apt-repository ppa:deadsnakes/ppa
           sudo apt install python3.13 python3.13-venv
           python3.13 -m pip install --upgrade pip

.github/workflows/pytest_unit.yml

@@ -7,13 +7,13 @@ jobs:
     timeout-minutes: 5
 
     steps:
-      - uses: actions/checkout@v4
+      - uses: actions/checkout@v6
 
-      - uses: actions/setup-python@v4
+      - uses: actions/setup-python@v6
         with:
           python-version: '3.13'
 
-      - uses: actions/cache@v4
+      - uses: actions/cache@v5
         id: cache
         with:
           path: ~/.cache/pip

.github/workflows/ruff.yml

@@ -4,7 +4,5 @@ jobs:
   ruff:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v4
-      - uses: chartboost/ruff-action@v1
-        with:
-          version: 0.15.12
+      - uses: actions/checkout@v6
+      - uses: astral-sh/ruff-action@v3