Update cheatsheets

tldr/pg_rewind

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+---
+syntax: markdown
+tags: [tldr, common]
+source: https://github.com/tldr-pages/tldr.git
+---
+# pg_rewind
+
+> Synchronize a PostgreSQL data directory with another data directory that was forked from it.
+> More information: <https://www.postgresql.org/docs/current/app-pgrewind.html>.
+
+- Synchronize target directory with source directory:
+
+`pg_rewind {{[-D|--target-pgdata]}} {{path/to/target_data}} --source-pgdata {{path/to/source_data}}`
+
+- Synchronize target with source server using connection string:
+
+`pg_rewind {{[-D|--target-pgdata]}} {{path/to/target_data}} --source-server {{connstr}}`
+
+- Perform a dry run:
+
+`pg_rewind {{[-D|--target-pgdata]}} {{path/to/target_data}} --source-pgdata {{path/to/source_data}} {{[-n|--dry-run]}}`
+
+- Show progress during synchronization:
+
+`pg_rewind {{[-D|--target-pgdata]}} {{path/to/target_data}} --source-pgdata {{path/to/source_data}} {{[-P|--progress]}}`
+
+- Display help:
+
+`pg_rewind {{[-?|--help]}}`