rel-0.4.0

Added

• Add security policy (#95)
• Add issue templates (#96)

Changed

• OpenTelemetry API/SDK 1.15.0 (#91)
• OpenTelemetry Instrumentation 0.36b0 (#91)
• x-trace-options header custom-* KVs written to entry span attributes (#85)
• Fix x-trace-options-signature extraction (#85)
• Fix validation of x-trace-options header (#87)
• Fix calculation of x-trace-options-response header (#88)
• Update GH organization (#96)