Trac #31412: GH Actions: Fix up for new linux runner default

The default version of ubuntu on GH Actions has changed, causing all
tox-docker-based workflows to fail.

https://github.com/mkoeppe/sage/runs/1919926427?check_suite_focus=true

URL: https://trac.sagemath.org/31412
Reported by: mkoeppe
Ticket author(s): Matthias Koeppe
Reviewer(s): Jonathan Kliem

.github/workflows/tox-experimental.yml

@@ -62,7 +62,7 @@ jobs:
       - name: Install test prerequisites
         run: |
           sudo DEBIAN_FRONTEND=noninteractive apt-get update
-          sudo DEBIAN_FRONTEND=noninteractive apt-get install python-tox
+          sudo DEBIAN_FRONTEND=noninteractive apt-get install tox
       - name: Try to login to docker.pkg.github.com
         # https://docs.github.com/en/actions/reference/workflow-commands-for-github-actions#setting-an-environment-variable
         run: |

.github/workflows/tox-gcc_spkg.yml

@@ -60,7 +60,7 @@ jobs:
       - name: Install test prerequisites
         run: |
           sudo DEBIAN_FRONTEND=noninteractive apt-get update
-          sudo DEBIAN_FRONTEND=noninteractive apt-get install python-tox
+          sudo DEBIAN_FRONTEND=noninteractive apt-get install tox
       - name: Try to login to docker.pkg.github.com
         # https://docs.github.com/en/actions/reference/workflow-commands-for-github-actions#setting-an-environment-variable
         run: |
@@ -114,7 +114,7 @@ jobs:
       - name: Install test prerequisites
         run: |
           sudo DEBIAN_FRONTEND=noninteractive apt-get update
-          sudo DEBIAN_FRONTEND=noninteractive apt-get install python-tox
+          sudo DEBIAN_FRONTEND=noninteractive apt-get install tox
       - name: Build and test with tox
         # We use a high parallelization on purpose in order to catch possible parallelization bugs in the build scripts.
         # For doctesting, we use a lower parallelization to avoid timeouts.

.github/workflows/tox-optional.yml

@@ -64,7 +64,7 @@ jobs:
       - name: Install test prerequisites
         run: |
           sudo DEBIAN_FRONTEND=noninteractive apt-get update
-          sudo DEBIAN_FRONTEND=noninteractive apt-get install python-tox
+          sudo DEBIAN_FRONTEND=noninteractive apt-get install tox
       - name: Try to login to docker.pkg.github.com
         # https://docs.github.com/en/actions/reference/workflow-commands-for-github-actions#setting-an-environment-variable
         run: |

.github/workflows/tox.yml

@@ -60,7 +60,7 @@ jobs:
       - name: Install test prerequisites
         run: |
           sudo DEBIAN_FRONTEND=noninteractive apt-get update
-          sudo DEBIAN_FRONTEND=noninteractive apt-get install python-tox
+          sudo DEBIAN_FRONTEND=noninteractive apt-get install tox
       - name: Try to login to docker.pkg.github.com
         # https://docs.github.com/en/actions/reference/workflow-commands-for-github-actions#setting-an-environment-variable
         run: |
@@ -163,7 +163,7 @@ jobs:
       - name: Install test prerequisites
         run: |
           sudo DEBIAN_FRONTEND=noninteractive apt-get update
-          sudo DEBIAN_FRONTEND=noninteractive apt-get install python-tox
+          sudo DEBIAN_FRONTEND=noninteractive apt-get install tox
       - name: Build and test with tox
         # We use a high parallelization on purpose in order to catch possible parallelization bugs in the build scripts.
         # For doctesting, we use a lower parallelization to avoid timeouts.