Axiom Go v0.15.2

What's Changed

• chore: tune http client by @lukasmalkmus in #217
• chore: improve ci linting by @lukasmalkmus in #218
• docs: improve readme by @lukasmalkmus in #216
• feat(otel): cleanups by @lukasmalkmus in #220
• Add support for APL variables by @bahlo in #210
• doc(ingest,query): better go doc on variables, labels and cursors by @lukasmalkmus in #221
• fix(ci): fix lint job caching by @lukasmalkmus in #223
• doc(query): improve variables go doc by @lukasmalkmus in #222

Full Changelog: v0.15.1...v0.15.2