Collapse mise CalVer updates into a single Renovate branch (#563)

mise uses CalVer (YEAR.MONTH.COUNTER), which Renovate maps onto SemVer
major/minor/patch and splits into separate PRs: counter bumps as patch,
month bumps as minor (both forked by the repo-wide separateMinorPatch),
and year bumps as major (forked by separateMajorMinor's default).

Since mise is self-managed and we only want the latest release, set
separateMajorMinor and separateMinorPatch to false on the mise package
rule so every update converges into one branch tracking the newest
version.

Author: nikobockerman

.github/renovate.json5

@@ -42,6 +42,10 @@
       minimumReleaseAge: "1 day", // 1 day delay to avoid errors installing very fresh version - https://github.com/jdx/mise/issues/2314
       prPriority: -1, // Lowest priority
       schedule: ["* 0-13 * * 4"], // Thursday, midnight through working day
+      // mise uses CalVer (YEAR.MONTH.COUNTER), not SemVer. Collapse the
+      // year/month/counter splits into one branch that tracks the latest release.
+      separateMajorMinor: false,
+      separateMinorPatch: false, // override repo-wide separateMinorPatch:true for mise
     },
     {
       description: "Automerge all updates",