Selenium fetcher - Test was on `4.14.1` but documentation was not, change both to `4` (#1912)

.github/workflows/test-only.yml

@@ -29,7 +29,7 @@ jobs:
           docker network create changedet-network
 
           # Selenium+browserless
-          docker run --network changedet-network -d --hostname selenium  -p 4444:4444 --rm --shm-size="2g"  selenium/standalone-chrome:4.14.1
+          docker run --network changedet-network -d --hostname selenium  -p 4444:4444 --rm --shm-size="2g"  selenium/standalone-chrome:4
           docker run --network changedet-network -d --hostname browserless -e "FUNCTION_BUILT_INS=[\"fs\",\"crypto\"]" -e "DEFAULT_LAUNCH_ARGS=[\"--window-size=1920,1080\"]" --rm  -p 3000:3000  --shm-size="2g"  browserless/chrome:1.60-chrome-stable
 
       - name: Build changedetection.io container for testing

docker-compose.yml

@@ -68,7 +68,7 @@ services:
 
 #    browser-chrome:
 #        hostname: browser-chrome
-#        image: selenium/standalone-chrome-debug:3.141.59
+#        image: selenium/standalone-chrome:4
 #        environment:
 #            - VNC_NO_PASSWORD=1
 #            - SCREEN_WIDTH=1920