ci: Run things we only run on 1 PHP version on the preinstalled 8.1 which installs ~2m faster

Signed-off-by: Joas Schilling <coding@schilljs.com>

.github/workflows/autocheckers.yml

@@ -45,7 +45,7 @@ jobs:
 
     strategy:
       matrix:
-        php-versions: ['8.3']
+        php-versions: ['8.1']
 
     name: PHP checkers
 

.github/workflows/integration-dav.yml

@@ -43,7 +43,7 @@ jobs:
       # do not stop on another job's failure
       fail-fast: false
       matrix:
-        php-versions: ['8.3']
+        php-versions: ['8.1']
         endpoint: ['old', 'new']
         service: ['CalDAV', 'CardDAV']
 

.github/workflows/integration-litmus.yml

@@ -43,7 +43,7 @@ jobs:
       # do not stop on another job's failure
       fail-fast: false
       matrix:
-        php-versions: ['8.3']
+        php-versions: ['8.1']
         endpoint: ['webdav', 'dav']
 
     name: Litmus WebDAV ${{ matrix.endpoint }}

.github/workflows/openapi.yml

@@ -31,7 +31,7 @@ jobs:
       - name: Set up php
         uses: shivammathur/setup-php@c541c155eee45413f5b09a52248675b1a2575231 #v2.31.1
         with:
-          php-version: '8.2'
+          php-version: '8.1'
           extensions: ctype, curl, dom, fileinfo, gd, json, libxml, mbstring, openssl, pcntl, pdo, posix, session, simplexml, xml, xmlreader, xmlwriter, zip, zlib
           coverage: none
           ini-file: development