[OOB] Upgrades 'dotnet-framework' to '51.5.8'

[SvcGitHubPATagentoperatorimages]

Automated OOB update requested by SvcGitHubPATagentoperatorimages.

Agent: dotnet-framework
Version: 51.5.7 -> 51.5.8

[github-actions]

Images built:

dotnet-core: ghcr.io/contrast-security-oss/agent-operator-images/agent-dotnet-core@sha256:bb854f916af92b2331d98384353485db476f4408a709d9fb339d3ee352834c87
dotnet-framework: ghcr.io/contrast-security-oss/agent-operator-images/agent-dotnet-framework@sha256:997cfb38fb79717105509fbaee03924796c5a5299986f0acba17a415763ee0af
java: ghcr.io/contrast-security-oss/agent-operator-images/agent-java@sha256:b79a1cbe7e77a95527797630f6eb5c5747bb4366608c02642f09f8c1455cdacc
nodejs: ghcr.io/contrast-security-oss/agent-operator-images/agent-nodejs@sha256:3370eafd147a7c8c36f02c6179805f2842e7882f8b3396a92a7248b626ce0561
php: ghcr.io/contrast-security-oss/agent-operator-images/agent-php@sha256:36c9e090f3f48c5ddff28ac040bd1fa2b53c5dd363ca28f10a753b453fd2bcfd
python: ghcr.io/contrast-security-oss/agent-operator-images/agent-python@sha256:5a55457749fbe409d14589cf96adeb55042eafcc0983e7558d4672bdd1b3b435
flex: ghcr.io/contrast-security-oss/agent-operator-images/agent-flex@sha256:06b6e0e0409f8086eed8c5aa8a6da11f794d40ae0e3e9d92463380e7091ba410