Use 81 for workflows (#1157)

* Use PHP 8.1 for workflows

* Update generated refs

.github/workflows/code-style.yml

@@ -18,7 +18,7 @@ jobs:
       - name: Setup PHP
         uses: shivammathur/setup-php@v2
         with:
-          php-version: '8.0'
+          php-version: '8.1'
 
       - uses: ramsey/composer-install@v1
         with:

.github/workflows/security-checks.yml

@@ -15,7 +15,7 @@ jobs:
       fail-fast: true
       matrix:
         operating-system: [ ubuntu-latest ]
-        php: [ '7.2', '7.3', '7.4', '8.0' ]
+        php: [ '7.2', '7.3', '7.4', '8.0', '8.1'' ]
         dependencies: [ 'highest' ]
 
     name: PHP ${{ matrix.php }} on ${{ matrix.operating-system }} with ${{ matrix.dependencies }} dependencies

docs/reference/annotations.md

@@ -104,7 +104,7 @@ Configuration details for a supported OAuth Flow.
 ## [Header](https://github.com/zircote/swagger-php/tree/master/src/Annotations/Header.php)
 
 ### References
-- [OAI Header Object](https://github.com/OAI/OpenAPI-Specification/blob/OpenAPI.next/versions/3.0.md#headerObject)
+- [OAI Header Object](https://github.com/OAI/OpenAPI-Specification/blob/OpenAPI.next/versions/3.0.md#headerObject).
 ### Properties
 - ref
 - header
@@ -366,7 +366,7 @@ On top of this subset, there are extensions provided by this specification to al
 ## [SecurityScheme](https://github.com/zircote/swagger-php/tree/master/src/Annotations/SecurityScheme.php)
 
 ### References
-- [OAI Security Scheme Object](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#securitySchemeObject)
+- [OAI Security Scheme Object](https://github.com/OAI/OpenAPI-Specification/blob/main/versions/3.1.0.md#securitySchemeObject).
 ### Properties
 - ref
 - securityScheme
@@ -403,7 +403,7 @@ An object representing a Server Variable for server URL template substitution.
 ## [Tag](https://github.com/zircote/swagger-php/tree/master/src/Annotations/Tag.php)
 
 ### References
-- [OAI Tag Object]( https://github.com/OAI/OpenAPI-Specification/blob/OpenAPI.next/versions/3.0.md#tagObject)
+- [OAI Tag Object]( https://github.com/OAI/OpenAPI-Specification/blob/OpenAPI.next/versions/3.0.md#tagObject).
 ### Properties
 - name
 - description
@@ -415,7 +415,7 @@ An object representing a Server Variable for server URL template substitution.
 ## [Xml](https://github.com/zircote/swagger-php/tree/master/src/Annotations/Xml.php)
 
 ### References
-- [OAI XML Object](https://github.com/OAI/OpenAPI-Specification/blob/OpenAPI.next/versions/3.0.md#xmlObject)
+- [OAI XML Object](https://github.com/OAI/OpenAPI-Specification/blob/OpenAPI.next/versions/3.0.md#xmlObject).
 ### Properties
 - name
 - namespace