[openssl/openssl] f97307: dependabot: update config to include CLA: trivial,...

[Pauli]

  Branch: refs/heads/master
  Home:   https://github.com/openssl/openssl
  Commit: f9730779eb4f7896f54627c8364af3f30904fe2b
      https://github.com/openssl/openssl/commit/f9730779eb4f7896f54627c8364af3f30904fe2b
  Author: Pauli <pauli at openssl.org>
  Date:   2023-04-28 (Fri, 28 Apr 2023)

  Changed paths:
    M .github/dependabot.yml

  Log Message:
  -----------
  dependabot: update config to include CLA: trivial, set branches etc

Reviewed-by: Tom Cosgrove <tom.cosgrove at arm.com>
Reviewed-by: Tomas Mraz <tomas at openssl.org>
(Merged from https://github.com/openssl/openssl/pull/20775)