Previously Dependabot was setup to submit PRs to every branch.
However, this does not align with the contributing guidelines which
state to only submit a PR on the oldest branch so that merge forward
strategy can be used.
This changes the dependabot configuration to better align with our
contributing guidelines:
- PRs for github actions are submitted against the oldest branch since
all branches will need updated using a merge forward stategy. Merging a
github action will require us to merge forward manually and preserve
the changes in the oldest branch to pickup the github actions update.
- Java dependencieds are submitted against each branch since they will
need to merge -s ours to preserve the correct major.minor semantics.
Merging a java dependency will now require us to do the merging manually.
5c92d90e36