Updated microservice example projects to support c# 10 during docker builds

[ktmitton]

Updated the target frameworks for the microservice example projects to net6.0 to support the c# 10 requirement during build through the docker pipeline

Fixes #2676.

Changes

• Changed the target frameworks of MicroServiceExample/WorkerService and MicroServiceExample/WebApi to net6.0
• Updated the associated Dockerfiles to use the net6.0 images

[linux-foundation-easycla]

• ❌ The commit (0f5b2eb) is missing the User's ID, preventing the EasyCLA check. Consult GitHub Help to resolve.For further assistance with EasyCLA, please submit a support request ticket.

[linux-foundation-easycla]

• ❌ The commit (0f5b2eb) is missing the User's ID, preventing the EasyCLA check. Consult GitHub Help to resolve.For further assistance with EasyCLA, please submit a support request ticket.

[reyang]

@ktmitton thanks for the contribution, would you clear the CLA?

[ktmitton]

@ktmitton thanks for the contribution, would you clear the CLA?

Trying to, but for some reason it's not taking. I'll have to revisit this tomorrow, sorry.

[codecov]

Codecov Report

Merging #2677 (cbab746) into main (9e83587) will decrease coverage by 0.02%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #2677      +/-   ##
==========================================
- Coverage   82.89%   82.87%   -0.03%     
==========================================
  Files         249      249              
  Lines        8705     8705              
==========================================
- Hits         7216     7214       -2     
- Misses       1489     1491       +2     

Impacted Files	Coverage Δ
...ter.ZPages/Implementation/ZPagesActivityTracker.cs	97.14% <0.00%> (-2.86%)	⬇️
...nTelemetry/Internal/OpenTelemetrySdkEventSource.cs	70.47% <0.00%> (-0.96%)	⬇️

[ktmitton]

@ktmitton thanks for the contribution, would you clear the CLA?

Ok, looks like it's good now. First time I've had to use this, sorry for the inconvenience!

[WillsonHG]

/easycla