README: minor updates

Fix styling and broken link.

Bug: None
Test: reviewed gitiles rendering
Change-Id: I29c376b988a00939af6952aaea690361cb805078
Reviewed-on: https://android-review.googlesource.com/c/platform/tools/repohooks/+/3422261
Lint: Lint 🤖 <ayeaye-gerrit@google.com>
Presubmit-Verified: Treehugger Robot <android-test-infra-workplan-finisher@system.gserviceaccount.com>
Autosubmit: Mike Frysinger <vapier@google.com>
Performance: CrystalBall Performance Presubmit <android-crystalball-presubmit-eng@google.com>
Reviewed-by: Alex Klein <saklein@google.com>
Open-Source-Licensing: Lint 🤖 <ayeaye-gerrit@google.com>

README.md

diff --git a/README.md b/README.md
index 664394b..d01c4a0 100644
--- a/README.md
+++ b/README.md
@@ -134,11 +134,12 @@
 checker prefix = check --file=${PREUPLOAD_FILES_PREFIXED}
 checker flag = check --file ${PREUPLOAD_FILES_PREFIXED}
 ```
+
 With a commit that changes `path1/file1` and `path2/file2`, then this will run
 programs with the arguments:
-* ['ls', 'path1/file1', 'path2/file2']
-* ['check', '--file=path1/file1', '--file=path2/file2']
-* ['check', '--file', 'path1/file1', '--file', 'path2/file2']
+* `['ls', 'path1/file1', 'path2/file2']`
+* `['check', '--file=path1/file1', '--file=path2/file2']`
+* `['check', '--file', 'path1/file1', '--file', 'path2/file2']`
 
 ## [Options]
 
@@ -245,7 +246,7 @@
 
 *** note
 This section can only be added to the repo project-wide settings
-[GLOBAL-PREUPLOAD.cfg].
+[GLOBAL-PREUPLOAD.cfg](#GLOBAL_PREUPLOAD_cfg).
 ***
 
 Used to explicitly exclude some projects when processing a hook. With this