docs: add repository availability information to README

my PDS backup script

Include links to GitHub and Tangled repositories in the README to clarify where the project is hosted and which version is primary

ewancroft.uk 11 months ago d612c420 f54a9c0d

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README.md

··· 1 1 # PDS Backup Script 2 2 3 + ***This repository is available on [GitHub](https://github.com/ewanc26/pds-backup) and [Tangled](https://tangled.sh/@ewancroft.uk/pds-backup). GitHub is the primary version, and the Tangled version is a mirror.*** 4 + 3 5 ## Overview 4 6 5 7 This Bash script automates the backup process for your Personal Data Server (PDS) files. It ensures minimal downtime by managing the PDS service—stopping it before a backup and restarting it afterwards—even in the event of errors. The script creates a timestamped compressed archive of the `/pds` directory, then transfers this archive to a remote destination via `rsync` over SSH. A change detection mechanism compares the new archive against the most recent backup using a SHA-256 checksum; if no changes are detected, the transfer is skipped, thereby preventing redundant backups.