ci: switch to weekly dependabot updates

Apparently some dependencies get updated much more often
than I would have exepected.

It can always be triggered manually at https://github.com/systemd/systemd/network/dependencies
if there are any urgent updates

.github/dependabot.yml

@@ -5,5 +5,5 @@ updates:
   - package-ecosystem: "github-actions"
     directory: "/"
     schedule:
-      interval: "daily"
+      interval: "weekly"
     open-pull-requests-limit: 2

.github/workflows/codeql-analysis.yml

@@ -5,6 +5,8 @@
 name: "CodeQL"
 
 on:
+  pull_request:
+    branches: [main]
   # It takes the workflow approximately 30 minutes to analyze the code base
   # so it doesn't seem to make much sense to trigger it on every PR or commit.
   # It runs daily at 01:00 to avoid colliding with the Coverity workflow.
@@ -18,6 +20,7 @@ jobs:
   analyze:
     name: Analyze
     runs-on: ubuntu-latest
+    if: github.event_name == 'schedule' || github.event.pull_request.user.login == 'dependabot[bot]'
     concurrency:
       group: ${{ github.workflow }}-${{ matrix.language }}-${{ github.ref }}
       cancel-in-progress: true

.github/workflows/linter.yml

@@ -29,7 +29,7 @@ jobs:
           fetch-depth: 0
 
       - name: Lint Code Base
-        uses: github/super-linter@7d5dc989c55aaba9d3b7194a7496cdfaa4866af3
+        uses: github/super-linter@563be7dc5568017515b9e700329e9c6d3862f2b7
         env:
           DEFAULT_BRANCH: main
           # Excludes:

docs/CONTAINER_INTERFACE.md

@@ -22,10 +22,12 @@ manager, please consider supporting the following interfaces.
    (that file overrides whatever is pre-initialized by the container manager).
 
 2. Make sure to pre-mount `/proc/`, `/sys/`, and `/sys/fs/selinux/` before
-   invoking systemd, and mount `/proc/sys/`, `/sys/`, and `/sys/fs/selinux/`
+   invoking systemd, and mount `/sys/`, `/sys/fs/selinux/` and `/proc/sys/`
-   read-only in order to prevent the container from altering the host kernel's
+   read-only (the latter via e.g. a read-only bind mount on itself) in order
-   configuration settings. (As a special exception, if your container has
+   to prevent the container from altering the host kernel's configuration
-   network namespaces enabled, feel free to make `/proc/sys/net/` writable).
+   settings. (As a special exception, if your container has network namespaces
+   enabled, feel free to make `/proc/sys/net/` writable. If it also has user, ipc,
+   uts and pid namespaces enabled, the entire `/proc/sys` can be left writable).
    systemd and various other subsystems (such as the SELinux userspace) have
    been modified to behave accordingly when these file systems are read-only.
    (It's OK to mount `/sys/` as `tmpfs` btw, and only mount a subset of its