fix: typos in documentation files (#1538)

* Update eth_gasPrice.md

* Update 04_RPC_METHOD_REQUEST.md

* fix: formatting btw

---------

Co-authored-by: Игорь <igor@MacBook-Air-Igor.local>
Co-authored-by: Elias Tazartes <66871571+Eikix@users.noreply.github.com>

Author: 3 people

.github/ISSUE_TEMPLATE/04_RPC_METHOD_REQUEST.md

@@ -9,7 +9,7 @@ assignees: ""
 
 # <METHOD_NAME>
 
-## Metadatax
+## Metadata
 
 - name:
 - prefix: