chore(deps): bump go.opentelemetry.io/otel/exporters/otlp/otlpmetric/otlpmetricgrpc from 1.44.0 to 1.45.0 - #48

Node.js 20 is deprecated. The following actions target Node.js 20 but are being forced to run on Node.js 24: actions/setup-go@19bb51245e9c80abacb2e91cc42b33fa478b8639. For more information see: https://github.blog/changelog/2025-09-19-deprecation-of-node-20-on-github-actions-runners/