Updates README files

Author: picandocodigo

elasticsearch-model/README.md

@@ -8,7 +8,7 @@ It aims to simplify integration of Ruby classes ("models"), commonly found e.g.
 
 This library is compatible with Ruby 2.4 and higher.
 
-The library version numbers follow the Elasticsearch major versions. The `main` branch is compatible with the latest Elasticsearch stack stable release.
+The version numbers follow the Elasticsearch major versions. Currently the `main` branch is compatible with version `7.x` of the Elasticsearch stack. **We haven't tested and updated the code for Elasticsearch `8.0` yet**.
 
 | Rubygem       |   | Elasticsearch |
 |:-------------:|:-:| :-----------: |

elasticsearch-persistence/README.md

@@ -6,14 +6,15 @@ Persistence layer for Ruby domain objects in Elasticsearch, using the Repository
 
 This library is compatible with Ruby 2.4 and higher.
 
-The library version numbers follow the Elasticsearch major versions. The `main` branch is compatible with the latest Elasticsearch stack stable release.
+The version numbers follow the Elasticsearch major versions. Currently the `main` branch is compatible with version `7.x` of the Elasticsearch stack. **We haven't tested and updated the code for Elasticsearch `8.0` yet**.
 
 | Rubygem       |   | Elasticsearch |
 |:-------------:|:-:| :-----------: |
 | 0.1           | → | 1.x           |
 | 2.x           | → | 2.x           |
 | 5.x           | → | 5.x           |
 | 6.x           | → | 6.x           |
+| 7.x           | → | 7.x           |
 | main          | → | 7.x           |
 
 ## Installation

elasticsearch-rails/README.md

@@ -8,8 +8,7 @@ library, providing features suitable for Ruby on Rails applications.
 
 This library is compatible with Ruby 1.9.3 and higher.
 
-The library version numbers follow the Elasticsearch major versions, and the `main` branch
-is compatible with the Elasticsearch `master` branch, therefore, with the next major version.
+The version numbers follow the Elasticsearch major versions. Currently the `main` branch is compatible with version `7.x` of the Elasticsearch stack. **We haven't tested and updated the code for Elasticsearch `8.0` yet**.
 
 | Rubygem       |   | Elasticsearch |
 |:-------------:|:-:| :-----------: |
@@ -18,7 +17,7 @@ is compatible with the Elasticsearch `master` branch, therefore, with the next m
 | 5.x           | → | 5.x           |
 | 6.x           | → | 6.x           |
 | 7.x           | → | 7.x           |
-| main          | → | master        |
+| main          | → | 7.x           |
 
 ## Installation