Update build-wheels workflow

Prune nightly wheels older than 3 days instead of 30.

.github/workflows/build-wheels.yml

@@ -147,8 +147,8 @@ jobs:
           mkdir -p simple/nautilus-trader/
 
           # Prune old wheels
-          echo "Pruning wheels older than 30 days"
-          find simple/nautilus-trader/ -type f -mtime +30 -name "*.whl" -exec rm -f {} \;
+          echo "Pruning wheels older than 3 days"
+          find simple/nautilus-trader/ -type f -mtime +3 -name "*.whl" -exec rm -f {} \;
 
           # Check wheels
           if [ -z "$(ls -A ../dist/*.whl)" ]; then

README.md

@@ -235,7 +235,7 @@ To install a specific nightly build (e.g. 1.208.0.dev20241212):
 **Notes**:
 - The `develop` branch is merged into the `nightly` branch daily at **14:00 UTC**.
 - The version naming convention is `dev.{date}`, where `{date}` corresponds to the UTC build date (e.g., 1.208.0.dev20241212 for a nightly build on December 12, 2024).
-- The nightly wheels have a **lookback window of 30 days**; wheels older than 30 days are automatically removed.
+- The nightly wheels currently have a **lookback window of 3 days**; wheels older than 3 days are automatically removed.
 
 ## Versioning and releases