chore: exclude requirements.txt file from renovate-bot (#1594)#2037

ansh0l merged 2 commits intomaingoogleapis/java-spanner:mainfrom

owl-bot-update-lock-f14e3fefe8e361e85752bd9890c8e56f2fe25f1e89cbb9597e4e3c7a429203a3googleapis/java-spanner:owl-bot-update-lock-f14e3fefe8e361e85752bd9890c8e56f2fe25f1e89cbb9597e4e3c7a429203a3Copy head branch name to clipboard