[OOB] Upgrades 'dotnet-framework' to '51.3.0'

[SvcGitHubPATagentoperatorimages]

Automated OOB update requested by SvcGitHubPATagentoperatorimages.

Agent: dotnet-framework
Version: 51.2.5 -> 51.3.0

[github-actions]

Images built:

dotnet-core: ghcr.io/contrast-security-oss/agent-operator-images/agent-dotnet-core@sha256:a3fa99e2ee87b1a70986f0af511d2d5cc603bdc0db2cc115ebb5b75f26d1c62e
dotnet-framework: ghcr.io/contrast-security-oss/agent-operator-images/agent-dotnet-framework@sha256:4c4307aec2f256cfd4ddf766c6c0cfa3a0a92e6560d50b6d47d6982524c42889
java: ghcr.io/contrast-security-oss/agent-operator-images/agent-java@sha256:449f584ccc5fb728dfb22fbec65e7cb45b794c02d12f1e816a88f615d11aa0fc
nodejs: ghcr.io/contrast-security-oss/agent-operator-images/agent-nodejs@sha256:38e1e6d07b0e1dfd681b91bc9c02ce268f9314e862d051e5ad7348751f5d36e6
php: ghcr.io/contrast-security-oss/agent-operator-images/agent-php@sha256:e3703481307b8008270b1601531a4a4126d4a124d1689f56bb73901277c2ed03
python: ghcr.io/contrast-security-oss/agent-operator-images/agent-python@sha256:79ad5001e43f49878773c4a05c25ea6f8150619afb995336269435e2170684d3
flex: ghcr.io/contrast-security-oss/agent-operator-images/agent-flex@sha256:cef12925fb9dbb80535472ab8fb3f89131935e00a1fdb4966341c6c103cadf3b