Markdown lint stability

[Kielek]

Bug Report

MD lint check if reporting following errors:

test/OpenTelemetry.Instrumentation.AspNetCore.Tests/RouteTests/README.net6.0.md:11:42 MD0[5](https://github.com/open-telemetry/opentelemetry-dotnet/actions/runs/7691900974/job/20957953269?pr=5270#step:4:6)1/link-fragments Link fragments should be valid [Context: "[Area using area:exists, default controller/action](#conventionalrouting-area-using-areaexists-default-controlleraction)"]
test/OpenTelemetry.Instrumentation.AspNetCore.Tests/RouteTests/README.net[6](https://github.com/open-telemetry/opentelemetry-dotnet/actions/runs/7691900974/job/20957953269?pr=5270#step:4:7).0.md:12:42 MD051/link-fragments Link fragments should be valid [Context: "[Area using area:exists, non-default action](#conventionalrouting-area-using-areaexists-non-default-action)"]
test/OpenTelemetry.Instrumentation.AspNetCore.Tests/RouteTests/README.net6.0.md:13:42 MD051/link-fragments Link fragments should be valid [Context: "[Area w/o area:exists, default controller/action](#conventionalrouting-area-wo-areaexists-default-controlleraction)"]
test/OpenTelemetry.Instrumentation.AspNetCore.Tests/RouteTests/README.net[7](https://github.com/open-telemetry/opentelemetry-dotnet/actions/runs/7691900974/job/20957953269?pr=5270#step:4:8).0.md:11:42 MD051/link-fragments Link fragments should be valid [Context: "[Area using area:exists, default controller/action](#conventionalrouting-area-using-areaexists-default-controlleraction)"]
test/OpenTelemetry.Instrumentation.AspNetCore.Tests/RouteTests/README.net7.0.md:12:42 MD051/link-fragments Link fragments should be valid [Context: "[Area using area:exists, non-default action](#conventionalrouting-area-using-areaexists-non-default-action)"]
test/OpenTelemetry.Instrumentation.AspNetCore.Tests/RouteTests/README.net7.0.md:13:42 MD051/link-fragments Link fragments should be valid [Context: "[Area w/o area:exists, default controller/action](#conventionalrouting-area-wo-areaexists-default-controlleraction)"]
test/OpenTelemetry.Instrumentation.AspNetCore.Tests/RouteTests/README.net[8](https://github.com/open-telemetry/opentelemetry-dotnet/actions/runs/7691900974/job/20957953269?pr=5270#step:4:9).0.md:[11](https://github.com/open-telemetry/opentelemetry-dotnet/actions/runs/7691900974/job/20957953269?pr=5270#step:4:12):42 MD051/link-fragments Link fragments should be valid [Context: "[Area using area:exists, default controller/action](#conventionalrouting-area-using-areaexists-default-controlleraction)"]
test/OpenTelemetry.Instrumentation.AspNetCore.Tests/RouteTests/README.net8.0.md:[12](https://github.com/open-telemetry/opentelemetry-dotnet/actions/runs/7691900974/job/20957953269?pr=5270#step:4:13):42 MD051/link-fragments Link fragments should be valid [Context: "[Area using area:exists, non-default action](#conventionalrouting-area-using-areaexists-non-default-action)"]
test/OpenTelemetry.Instrumentation.AspNetCore.Tests/RouteTests/README.net8.0.md:13:42 MD051/link-fragments Link fragments should be valid [Context: "[Area w/o area:exists, default controller/action](#conventionalrouting-area-wo-areaexists-default-controlleraction)"]

Links seems to be correct and work fine on GitHub/VS Code/Rider side. Ref: https://github.com/open-telemetry/opentelemetry-dotnet/actions/runs/7691900974/job/20957953269

[Kielek]

Fixed by @CodeBlanch in #5281