build: bump version to v0.20.3-beta.rc1

[ziggie1984]

Change

Bump the lnd build patch version from 0.20.2-beta to 0.20.3-beta.rc1 on the v0.20.x-branch release branch.

Validation

• go test ./build

[github-actions]

🟡 PR Severity: MEDIUM

files API | 1 files | 4 lines changed

🟡 Medium (1 files)

• build/version.go - version string bump, not categorized as a higher-severity package

Analysis

This PR only touches build/version.go, bumping the patch version from 0.20.2-beta to 0.20.3-beta.rc1 ahead of a release branch cut. It's a single-file, 4-line change to a version constant with no logic changes, so it falls under "Other Go files not categorized above" and does not meet any of the criteria for a severity bump (file count, line count, or multiple critical packages touched).

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