ci: Fix apt-get command in bump.yml

The bump.yml workflow, running on a schedule, has always failed to
complete so far [0]. This is because an "apt-get" command is missing the
"install" subcommand, resulting in apt trying to interpret the name of
the package we want to install as a subcommand, making the workflow
fail.

Fix the command, to hopefully make the workflow succeed.

[0] https://github.com/githedgehog/dataplane/actions/workflows/bump.yml

Fixes: 08ac167 ("build: Rework many parts of the build framework")
Signed-off-by: Quentin Monnet <[email protected]>

.github/workflows/bump.yml

@@ -51,7 +51,7 @@ jobs:
       - name: "install envsubst"
         run: |
           sudo apt-get update
-          sudo apt-get --yes --no-install-recommends gettext
+          sudo apt-get install --yes --no-install-recommends gettext
       - run: |
           ./scripts/update-versions.sh
       - name: "Create Pull Request"