update: add salt-3007.x version v3007.3 (#2374)

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

salt-minion.sls

@@ -17,6 +17,7 @@
 # updated to the latest version). New major versions e.g. 3008.0 must be added manually.
 {%- load_yaml as relenv_versions %}
 # renovate: datasource=github-tags depName=salt-3007.x packageName=saltstack/salt
+- '3007.3'
 - '3007.2'
 - '3007.1'
 - 3007.0