MAINT - Upgrade GH actions

.github/PULL_REQUEST_TEMPLATE.md

@@ -1,6 +1,8 @@
 Fixes # .
 
-<!-- Reference the issue corresponding to this PR. If an issues does not exist, consider opening one or writing a detailed description for what this PR changes and it's value in the following sections. -->
+<!-- Reference the issue corresponding to this PR. If an issue does not exist,
+consider opening one or writing a detailed description of what this PR changes
+and its value in the following sections. -->
 <!-- GitHub Docs on Keywords: https://docs.github.com/en/get-started/writing-on-github/working-with-advanced-formatting/using-keywords-in-issues-and-pull-requests -->
 
 ## Description
@@ -24,3 +26,7 @@ This pull request:
 ## Additional information
 
 <!-- Do you have any other information about this pull request? This may include screenshots, references, and/or implementation notes. -->
+
+## How to test
+
+<!-- Please add any relevant details to test this functionality even if you added automated tests -->

.github/workflows/build.yml

@@ -23,7 +23,7 @@ jobs:
         uses: jupyterlab/maintainer-tools/.github/actions/base-setup@v1
 
       - name: 'Install dependencies 📦'
-        run: python -m pip install -U jupyterlab~=3.1
+        run: python -m pip install -U "jupyterlab<4"
 
       - name: 'Lint the extension 🧹'
         run: |
@@ -68,7 +68,7 @@ jobs:
         uses: actions/checkout@v4
 
       - name: 'Install Python 🐍'
-        uses: actions/setup-python@v4
+        uses: actions/setup-python@v5
         with:
           python-version: '3.9'
           architecture: 'x64'
@@ -85,7 +85,7 @@ jobs:
           sudo rm -rf $(which node)
           sudo rm -rf $(which node)
 
-          pip install "jupyterlab~=3.1" jupyterlab_conda_store*.whl
+          pip install "jupyterlab<4" jupyterlab_conda_store*.whl
 
 
           jupyter labextension list
@@ -124,7 +124,7 @@ jobs:
         run: jlpm install
 
       - name: 'Set up browser cache'
-        uses: actions/cache@v3
+        uses: actions/cache@v4
         with:
           path: |
             ${{ github.workspace }}/pw-browsers