[stable20] Change output format of Psalm to Github

Manual backport of https://github.com/nextcloud/server/pull/29044

Signed-off-by: MichaIng <micha@dietpi.com>

.github/workflows/static-code-analysis.yml

@@ -21,7 +21,7 @@ jobs:
             - name: Composer install
               run: composer i
             - name: Psalm
-              run: composer run psalm -- --monochrome --no-progress --output-format=text --update-baseline || ( git diff -- . ':!lib/composer' && exit 1 )
+              run: composer run psalm -- --monochrome --no-progress --output-format=github --update-baseline || ( git diff -- . ':!lib/composer' && exit 1 )
             - name: Check diff
               run: git diff -- . ':!lib/composer'
             - name: Show potential changes in Psalm baseline