Add PR descriptions

Author: isabellewei

src/content/docs/en/technology/overview/scroll-upgrades.mdx

@@ -44,10 +44,10 @@ This significant upgrade will reduce gas fees on the Scroll chain by 1.5x. Highl
 
 The code changes for this upgrade are documented in the following PRs:
 
-- [PR 1317](https://github.com/scroll-tech/scroll/pull/1317)
-- [PR 1343](https://github.com/scroll-tech/scroll/pull/1343)
-- [PR 1354](https://github.com/scroll-tech/scroll/pull/1354)
-- [PR 1372](https://github.com/scroll-tech/scroll/pull/1372)
+- [Accept compressed batches](https://github.com/scroll-tech/scroll/pull/1317)
+- [Update `L1GasPriceOracle`](https://github.com/scroll-tech/scroll/pull/1343)
+- [Change `MAX_COMMIT_SCALAR` and `MAX_BLOB_SCALAR` to 1e18](https://github.com/scroll-tech/scroll/pull/1354)
+- [Remove batch index check when updating a verifier](https://github.com/scroll-tech/scroll/pull/1372)
 
 The main changes are as follows: