Update opc version in makefile

Signed-off-by: divyansh42 <diagrawa@redhat.com>

Author: divyansh42

Makefile

@@ -5,7 +5,7 @@ MAG_VERSION := $(shell sed -n '/[ ]*github.com\/openshift-pipelines\/manual-appr
 
 GO := go
 GOVERSION := 1.22
-OPC_VERSION := 1.20.3
+OPC_VERSION := 1.20.5
 BINARYNAME := opc
 GOLANGCI_LINT := golangci-lint
 export GOTOOLCHAIN=auto