docs: Improve markdownlint configuration (#11104)

## Description

Closes: #9404



---

### Author Checklist

*All items are required. Please add a note to the item if the item is not applicable and
please add links to any relevant follow up issues.*

I have...

- [x] included the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] added `!` to the type prefix if API or client breaking change
- [x] targeted the correct branch (see [PR Targeting](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#pr-targeting))
- [x] provided a link to the relevant issue or specification
- [ ] followed the guidelines for [building modules](https://github.com/cosmos/cosmos-sdk/blob/master/docs/building-modules)
- [ ] included the necessary unit and integration [tests](https://github.com/cosmos/cosmos-sdk/blob/master/CONTRIBUTING.md#testing)
- [ ] added a changelog entry to `CHANGELOG.md`
- [ ] included comments for [documenting Go code](https://blog.golang.org/godoc)
- [ ] updated the relevant documentation or specification
- [x] reviewed "Files changed" and left comments if necessary
- [x] confirmed all CI checks have passed

### Reviewers Checklist

*All items are required. Please add a note if the item is not applicable and please add
your handle next to the items reviewed if you only reviewed selected items.*

I have...

- [ ] confirmed the correct [type prefix](https://github.com/commitizen/conventional-commit-types/blob/v3.0.0/index.json) in the PR title
- [ ] confirmed `!` in the type prefix if API or client breaking change
- [ ] confirmed all author checklist items have been addressed 
- [ ] reviewed state machine logic
- [ ] reviewed API design and naming
- [ ] reviewed documentation is accurate
- [ ] reviewed tests and test coverage
- [ ] manually tested (if applicable)

contrib/githooks/README.md

@@ -2,7 +2,7 @@
 
 Installation:
 
-```
+```sh
 git config core.hooksPath contrib/githooks
 ```
 
@@ -13,7 +13,7 @@ to correctly format the `.go` files included in the commit, provided
 that all the aforementioned commands are installed and available
 in the user's search `$PATH` environment variable:
 
-```
+```sh
 go get golang.org/x/tools/cmd/goimports
 go get github.com/golangci/misspell/cmd/misspell@master
 ```

contrib/images/simd-dlv/README.md

@@ -15,14 +15,17 @@ Both `simd-env` and `simd-dlv` work and run the same, except that `simd-dlv` use
 ## How to use
 
 The command to start a local network in debug mode is:
+
 ```shell
 # make localnet-debug
 ```
 
 The command to stop the local network and destroy its containers is:
+
 ```shell
 # make localnet-stop
 ```
+
 __note: this works the same for both `localnet-start` and `localnet-debug`__
 
 Now, by default only `simdnode0` is run in debug mode, but you can run any of the other nodes in debug mode by changing the `DEBUG` environment variable to `1` in `docker-compose.yml`.

contrib/rosetta/README.md

@@ -6,10 +6,10 @@ This directory contains the files required to run the rosetta CI. It builds `sim
 
 Builds:
 
-- cosmos-sdk simapp node, with prefixed data directory, keys etc. This is required to test historical balances.
-- faucet is required so we can test construction API, it was literally impossible to put there a deterministic address to request funds for
-- rosetta is the rosetta node used by rosetta-cli to interact with the cosmos-sdk app
-- test_rosetta runs the rosetta-cli test against construction API and data API
+* cosmos-sdk simapp node, with prefixed data directory, keys etc. This is required to test historical balances.
+* faucet is required so we can test construction API, it was literally impossible to put there a deterministic address to request funds for
+* rosetta is the rosetta node used by rosetta-cli to interact with the cosmos-sdk app
+* test_rosetta runs the rosetta-cli test against construction API and data API
 
 ## configuration
 
@@ -25,5 +25,5 @@ The docker image for ./rosetta-cli/Dockerfile is on [docker hub](https://hub.doc
 
 ## Notes
 
-- Keyring password is 12345678
-- data.sh creates node data, it's required in case consensus breaking changes are made to quickly recreate replicable node data for rosetta
+* Keyring password is 12345678
+* data.sh creates node data, it's required in case consensus breaking changes are made to quickly recreate replicable node data for rosetta