chore: inacuracies in release notes for v20 and v19 (dashpay#5709)

## What was done?
Fixes some inaccuracies for release notes for v20.0.0, for v19.2.0.


## How Has This Been Tested?
n/a

## Breaking Changes
n/a


## Checklist:
- [x] I have performed a self-review of my own code
- [ ] I have commented my code, particularly in hard-to-understand areas
- [ ] I have added or updated relevant unit/integration/functional/e2e
tests
- [ ] I have made corresponding changes to the documentation
- [x] I have assigned this pull request to a milestone

Author: knst

doc/release-notes.md

@@ -281,7 +281,7 @@ while mixing.
 - `logging` and `debug` rpc support new logging categories `validations` and
   `i2p`
 
-  - `gettxoutsetinfo` RPC has 2 new parameters and lots of new fields in
+- `gettxoutsetinfo` RPC has 2 new parameters and lots of new fields in
   results. Please check `help gettxoutsetinfo` for more information.
 
 - `gettxchainlocks` Returns the block height each transaction was mined at and
@@ -433,7 +433,7 @@ meaningful results.
 ## Backports from Bitcoin Core
 
 This release introduces many updates from Bitcoin  v0.20-v22.0 as well as
-numerous updates from Bitcoin v23.0 and v25.0. Bitcoin changes that do not align
+numerous updates from Bitcoin v23.0-v25.0. Bitcoin changes that do not align
 with Dash’s product needs, such as SegWit and RBF, are excluded from our
 backporting. For additional detail on what’s included in Bitcoin, please refer
 to their release notes.

doc/release-notes/dash/release-notes-19.2.0.md

@@ -148,7 +148,7 @@ Dash Core tree 0.12.1.x was a fork of Bitcoin Core tree 0.12.
 
 These release are considered obsolete. Old release notes can be found here:
 
-- [v19.1.0](https://github.com/dashpay/dash/blob/master/doc/release-notes/dash/release-notes-19.0.0.md) released May/22/2023
+- [v19.1.0](https://github.com/dashpay/dash/blob/master/doc/release-notes/dash/release-notes-19.1.0.md) released May/22/2023
 - [v19.0.0](https://github.com/dashpay/dash/blob/master/doc/release-notes/dash/release-notes-19.0.0.md) released Apr/14/2023
 - [v18.2.2](https://github.com/dashpay/dash/blob/master/doc/release-notes/dash/release-notes-18.2.2.md) released Mar/21/2023
 - [v18.2.1](https://github.com/dashpay/dash/blob/master/doc/release-notes/dash/release-notes-18.2.1.md) released Jan/17/2023