BPRT sync: point the page and docstrings at static/Sync-BPRT.ps1

Follow-up to 92f1e62, which moved the file but missed these references.

webapp/services/bprt_sync.py

@@ -6,7 +6,7 @@ packages, the Office zips and the bulk-enroll orchestrator scripts. The vendor
 keeps it current on the user's GE work PC with MediaCreator Lite; this server
 is only reachable from there over the GE network (this webapp and SSH, no
 SMB), and never reaches out itself. So the user runs
-scripts/windows/Sync-BPRT.ps1 there, which:
+webapp/static/Sync-BPRT.ps1 there (downloadable from the BPRT page), which:
 
   1. GETs manifest.json (path, size, sha256 of every vendor file here);
   2. hashes its own copy and uploads only new or changed files, plus a
@@ -1434,11 +1434,10 @@ def active_imaging():
 
 
 def sync_script():
-    """Path of scripts/windows/Sync-BPRT.ps1 when the webapp can serve it."""
+    """Path of static/Sync-BPRT.ps1 (shipped with the webapp) when it can be served."""
     here = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
     for p in (os.environ.get("BPRT_SYNC_SCRIPT", ""),
-              os.path.join(here, "static", "Sync-BPRT.ps1"),
-              os.path.join(here, "..", "scripts", "windows", "Sync-BPRT.ps1")):
+              os.path.join(here, "static", "Sync-BPRT.ps1")):
         if p and os.path.isfile(p):
             return os.path.abspath(p)
     return None