fix: use semver-coerced versioning

I've noticed that truncated versioning upgrades is no longer working.

Looking at the logs in Renovate, the versions are reporting as invalid:

```json
 {
  "depName": "goreleaser/goreleaser",
  "currentValue": "2.3",
  "datasource": "github-releases",
  "versioning": "semver",
  "replaceString": " 2.3 # datasource=github-releases depName=goreleaser/goreleaser\n",
  "updates": [],
  "packageName": "goreleaser/goreleaser",
  "warnings": [],
  "skipReason": "invalid-value"
}
```

This is an attempt to fix this situation by switching to coerced semver,
which allows coersion of truncated version numbers

renovate-truncated-versions.json

@@ -12,14 +12,20 @@
         "goreleaser/goreleaser",
         "gitlab.com/gitlab-com/gl-infra/jsonnet-tool"
       ],
-      "extractVersion": "^v?(?<version>\\d+\\.\\d+)"
+      "extractVersion": "^v?(?<version>\\d+\\.\\d+)",
+      "versioning": "semver-coerced"
     },
     {
       "matchPackageNames": [
         "gitlab-com/gl-infra/common-ci-tasks"
       ],
-      "matchManagers": ["gitlabci", "gitlabci-include", "pre-commit"],
-      "extractVersion": "^(?<version>v?\\d+\\.\\d+)"
+      "matchManagers": [
+        "gitlabci",
+        "gitlabci-include",
+        "pre-commit"
+      ],
+      "extractVersion": "^(?<version>v?\\d+\\.\\d+)",
+      "versioning": "semver-coerced"
     }
   ]
 }