fixes links in READMEs and issue templates

[muttonchop]

Changes

Fixes documentation links as mentioned in #1358

How to Review

1. Double check that I didn't put the openapi-fetch links in the openapi-typescript templates
2. Notify of any additional links that are dead. I tried clicking through most of them, but I easily could have missed them.

Checklist

• Unit tests updated
• docs/ updated (if necessary)
• pnpm run update:examples run (only applicable for openapi-typescript)

[changeset-bot]

⚠️ No Changeset found

Latest commit: bec9c22

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[drwpow]

Thank you!