add proposal to use upstream renovate github app

art-decisions/proposals/2025-02-26-use-upstream-renovate.md

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+# Use upstream renovate in replacement of Red Hat hosted version
+
+As an amendment to proposal
+[2023-03-08-automated-dependency-updates](2023-03-08-automated-dependency-updates.md),
+the Arcalot organization will use the upstream
+[Mend Renovate GitHub App](https://github.com/marketplace/renovate) service as the
+primary means of automated dependency management and resolution rather than the
+Renovate bot service hosted internally by Red Hat.
+
+Implementing this change involves configuring the Renovate GitHub App to access all
+repositories, and then removing the redhat-renovate-bot as a member of the Arcalot
+organization. All other existing Renovate-related configurations can remain unchanged.
+Some additional one-time maintenance of repos will also likely be required to remove
+any unmerged changes from the existing Red Hat Renovate bot.
+
+## Voting Period
+
+The voting period for this proposal will be open for 7 days from its submission.
+
+## Benefits
+
+The upstream Renovate GitHub App is actively maintained by the community, it has proven
+in testing to create more user-friendly PRs, and it may alleviate some troubles we have
+seen with Go version compatibility. This change also provides more ongoing maintenance
+reliability as we are currently unsure of the future support and maintenance of the
+internally-hosted Renovate, and our goal is to minimize Arcalot maintenance efforts as
+much as possible.
+
+## Drawbacks
+
+Our line of support may not be as direct as with the internally hosted version of
+Renovate.