chore(deps): update grafana/alloy docker tag to v1.20.1

[renovate]

This PR contains the following updates:

Package	Update	Change
grafana/alloy	patch	v1.20.0 → v1.20.1

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Release Notes

grafana/alloy (grafana/alloy)

v1.20.1

Compare Source

Bug Fixes 🐛

• loki: Add the timestamp to batch size calculation [backport] (#​7248) (3457a1c)
• loki: Include estimate for stream labels in batch size [backport] (#​7247) (b346475)
• loki: Make loki_write_sent_bytes_total and loki_write_dropped_bytes_total count uncompressed bytes [backport] (#​7249) (575025a)
• otelcol.connector.host_info: Mirror upstream logic and fix potential sources of over-count [backport] (#​7253) (479eb6f)
• otelcol.receiver.cloudflare: Default max_request_body_size to 20MiB [backport] (#​7254) (237fac7)
• prometheus.remote_write: Tolerate unknown WAL record types on replay [backport] (#​7237) (a613be5)

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