Implement collection release process (#1083)

Signed-off-by: Mohammed Naser mnaser@vexxhost.com
diff --git a/build/pin-images.py b/build/pin-images.py
index 644d0a2..d35ca65 100755
--- a/build/pin-images.py
+++ b/build/pin-images.py
@@ -126,7 +126,9 @@
     parser.add_argument(
         "src", help="Path for default values file", type=argparse.FileType("r")
     )
-    parser.add_argument("dst", help="Path for output file", type=argparse.FileType("w"))
+    parser.add_argument(
+        "dst", help="Path for output file", type=argparse.FileType("r+")
+    )
     parser.add_argument(
         "-r",
         "--registry",