chore: remove Dockerfile for version 2.1.3 and update skipped versions list

Author: swaroop-osec

docker/v2.1.3.Dockerfile

@@ -71,7 +71,7 @@
 SKIPPED_VERSIONS = {
     "v1.15", "v1.14.0", "v1.10.0", "v1.10.16", "v1.10.18",
     "v1.10.27", "v1.10.36", "v1.10.37", "v1.11.7", "v1.11.8", "v1.11.9",
-    "v1.13.0", 'v1.18.24', 'v2.0.12', 'v2.1.12', "v.2.1.19", "v.2.2.25"
+    "v1.13.0", 'v1.18.24', 'v2.0.12', 'v2.1.3', 'v2.1.12', "v.2.1.19", "v.2.2.25"
 }
 
 # Determine release information for Solana or Agave