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)

x/crisis/README.md

@@ -4,4 +4,4 @@ order: 0
 
 # Crisis
 
-- [Crisis](spec/README.md) - Halting the blockchain under certain circumstances (e.g. if an invariant is broken).
+* [Crisis](spec/README.md) - Halting the blockchain under certain circumstances (e.g. if an invariant is broken).

x/crisis/spec/01_state.md

@@ -14,4 +14,4 @@ with the standard gas consumption method.
 
 The ConstantFee param is held in the global params store.
 
-- Params: `mint/params -> legacy_amino(sdk.Coin)`
+* Params: `mint/params -> legacy_amino(sdk.Coin)`

x/crisis/spec/02_messages.md

@@ -11,12 +11,12 @@ corresponding updates to the state.
 
 Blockchain invariants can be checked using the `MsgVerifyInvariant` message.
 
-+++ https://github.com/cosmos/cosmos-sdk/blob/v0.40.0-rc7/proto/cosmos/crisis/v1beta1/tx.proto#L14-L22
++++ <https://github.com/cosmos/cosmos-sdk/blob/v0.40.0-rc7/proto/cosmos/crisis/v1beta1/tx.proto#L14-L22>
 
 This message is expected to fail if:
 
-- the sender does not have enough coins for the constant fee
-- the invariant route is not registered
+* the sender does not have enough coins for the constant fee
+* the invariant route is not registered
 
 This message checks the invariant provided, and if the invariant is broken it
 panics, halting the blockchain. If the invariant is broken, the constant fee is

x/crisis/spec/README.md

@@ -16,11 +16,11 @@ application initialization process.
 ## Contents
 
 1. **[State](01_state.md)**
-    - [ConstantFee](01_state.md#constantfee)
+    * [ConstantFee](01_state.md#constantfee)
 2. **[Messages](02_messages.md)**
-    - [MsgVerifyInvariant](02_messages.md#msgverifyinvariant)
+    * [MsgVerifyInvariant](02_messages.md#msgverifyinvariant)
 3. **[Events](03_events.md)**
-    - [Handlers](03_events.md#handlers)
+    * [Handlers](03_events.md#handlers)
 4. **[Parameters](04_params.md)**
 5. **[Client](05_client.md)**
-    - [CLI](05_client.md#cli)
+    * [CLI](05_client.md#cli)