Fix dead links in README

[1t1sCooL]

Link-checked the README and fixed what is confirmed dead. Every dead URL was re-verified with curl (browser UA; NXDOMAIN double-checked via 8.8.8.8), and every replacement URL returns HTTP 200.

• https://barafael.github.io/A-Platform-Agnostic-Driver-for-EBYTE-E32-LoRa-Modules/ → https://barafael.github.io/posts/a-platform-agnostic-driver-for-ebyte-e32-lora-modules/
  • Old URL 404; barafael.github.io sitemap.xml lists the post under new /posts/ path; replacement returns 200 with title 'A Platform-Agnostic Driver for EBYTE-E32 LoRa Modules'.
• https://barafael.github.io/A-Platform-Agnostic-Driver-for-the-CD74HC4067 → https://barafael.github.io/posts/a-platform-agnostic-driver-for-the-cd74hc4067/
  • Old URL 404; blog restructured to /posts/ (per sitemap.xml); replacement returns 200 with title 'A Platform-Agnostic Driver for the CD74HC4067'.
• https://barafael.github.io/A-Platform-Agnostic-Driver-for-the-HC12-serial-radio-module/ → https://barafael.github.io/posts/a-platform-agnostic-driver-for-the-hc12-serial-radio-module/
  • Old URL 404; blog restructured to /posts/ (per sitemap.xml); replacement returns 200 with title 'A Platform-Agnostic driver for the HC12 serial radio module'.
• https://robamu.github.io/post/max11619-driver-rust/ → https://robamu.github.io/blog/max11619-driver-rust/
  • Old /post/ path 404; robamu.github.io sitemap.xml shows the post moved to /blog/; replacement returns 200 with title 'Rust driver for the 10-bit MAX11619 ADCs'.
• https://robamu.github.io/post/rust-ecosystem/ → https://robamu.github.io/blog/rust-ecosystem/
  • Old /post/ path 404; sitemap.xml shows /blog/rust-ecosystem/; replacement returns 200 with title 'Bringing Rust to Space - Setting up a Rust ecosystem for the VA108XX MCU family'. Occurs twice in README (Vorago HAL and vorago-reb1 board sections).
• https://www.starfivetech.com/en/site/soc → https://www.starfivetech.com/en/index.php?s=computing&c=show&id=1
  • Old /en/site/soc is 404 in curl and real browser; StarFive site restructured to index.php URLs. Replacement returns 200 with title 'JH-7110_SoC_Edge Computing_StarFive' — the current official JH7110 (JH71xx family) SoC page. Occurs twice in README (jh71xx-pac and jh71xx-hal lines).
• https://www.theembeddedrustacean.com/c/ser-no-std → https://www.theembeddedrustacean.com/ser-esp-no-std
  • Old /c/ path 404; site sitemap.xml lists /ser-esp-no-std, which returns 200 with title 'Simplifed Embedded Rust: ESP Core Library Edition | The Embedded Rustacean' — same book.
• https://www.theembeddedrustacean.com/c/ser-std → https://www.theembeddedrustacean.com/ser-esp-std
  • Old /c/ path 404; site sitemap.xml lists /ser-esp-std, which returns 200 with title 'Simplifed Embedded Rust: ESP Standard Library Edition | The Embedded Rustacean' — same book.

Happy to adjust or split this if you'd prefer a different fix for any item.

[1t1sCooL]

Note on the Super Linter failure: the three markdownlint findings (README.md:1361 MD009 trailing space, README.md:1402-1403 MD053 unused reference definitions embedded-3dgfx / embedded-gui) are pre-existing on master — running markdownlint with the repo's .markdownlint.yml against current master gives the identical three errors. This PR only touches link URLs (lines 180-181, 336, 581, 595, 776, 973-974, 977, 985). Happy to fold a fix for those three lines into this PR if you'd prefer.