remove unsupported metrics from README

[imor]

Since process_heap_bytes not really supported by the crate, removed it from the README. On a first casual read I got the impression that this metric was supported. It's probably better to track it as an issue if there are plans to support it in the future.

Summary by CodeRabbit

• Documentation
  • Updated the supported metrics list in the README to reflect current availability.
  • Removed the process_heap_bytes metric from the documented metrics table.
  • Confirmed that all other listed metrics and their platform support remain unchanged.

[coderabbitai]

Walkthrough

Documentation update: the process_heap_bytes metric was removed from the supported metrics list in README.md. No code or public API changes.

Changes

Cohort / File(s)	Summary of Changes
Documentation README.md	Removed the process_heap_bytes metric from the supported metrics table; no other metric listings altered.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~2 minutes

Poem

I nibble notes on pages bright,
A metric hops right out of sight—
No heap to heap, no bytes to weigh,
The README trims its leafy sway.
Thump-thump! I stamp in tidy cheer,
Lean carrots, lean docs, crystal-clear. 🥕

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📥 Commits

Reviewing files that changed from the base of the PR and between bdc514c and 42d4671.

📒 Files selected for processing (1)

• README.md (0 hunks)

💤 Files with no reviewable changes (1)

• README.md

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[codecov]

Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 63.63%. Comparing base (bdc514c) to head (42d4671).
⚠️ Report is 2 commits behind head on main.

Additional details and impacted files

@@            Coverage Diff             @@
##             main      #71      +/-   ##
==========================================
+ Coverage   55.68%   63.63%   +7.95%     
==========================================
  Files           5        5              
  Lines         264      209      -55     
==========================================
- Hits          147      133      -14     
+ Misses        117       76      -41     

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[lambdalisue]

I’m sorry, but I’d like to keep that. We are not planning to support it, but since the entry is listed on the process metrics page, I think we should clarify that we do not support it.

I think it's clear enough.