Bump github.com/nginxinc/nginx-go-crossplane from 0.4.46 to 0.4.81 #6025

Job	Run time
Lint	7m 28s
Unit Tests	7m 59s
Unit tests with race condition detection	8m 20s
Build Unsigned Snapshot	6m 48s
Performance Tests	12m 12s
Proxy Sanity Check	0s
Integration Tests (alpine, 3.22)	6m 5s
Integration Tests (ubuntu, 24.04)	6m 55s
Integration Tests (redhatenterprise, 9)	6m 40s
Upgrade Tests (redhatenterprise, 9)	3m 54s
Upgrade Tests (alpine, 3.22)	2m 57s
Upgrade Tests (ubuntu, 24.04)	4m 3s
Load Tests	0s
Integration Tests - Official OSS Images	0s
Integration Tests - Official Plus Images	0s
Metrics Integration Tests - Official OSS Images	0s
Metrics Integration Tests - Official Plus Images	0s
	1h 13m 21s

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