[docs] Update release instructions

[mx-psi]

Description: Update release instructions based on my experience on 0.60.0. In particular:

1. Reword the description of what steps are owned by the release manager based on the new template
2. Explicitly note that you have to commit changes to the changelog before running the pre-release step.
3. Add links to issues I always run into.

[codecov]

Codecov Report

Base: 91.73% // Head: 91.82% // Increases project coverage by +0.09% 🎉

Coverage data is based on head (6ad5bf0) compared to base (d56b7b7).
Patch has no changes to coverable lines.

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #6068      +/-   ##
==========================================
+ Coverage   91.73%   91.82%   +0.09%     
==========================================
  Files         217      217              
  Lines       13411    13337      -74     
==========================================
- Hits        12302    12247      -55     
+ Misses        886      861      -25     
- Partials      223      229       +6     

Impacted Files	Coverage Δ
pdata/pcommon/common.go	91.78% <0.00%> (-2.70%)	⬇️
config/common.go	100.00% <0.00%> (ø)
service/featuregate/flags.go	100.00% <0.00%> (ø)
pdata/pmetric/metric_data_point_flags.go	100.00% <0.00%> (ø)
pdata/pcommon/generated_primitive_slice.go	100.00% <0.00%> (ø)
pdata/pmetric/metrics.go	90.00% <0.00%> (+21.35%)	⬆️

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