Update Ubuntu 20.04 to test with libraw. (#92)

Author: asmorkalov

.github/workflows/OCV-Contrib-PR-4.x-U20.yaml

@@ -34,7 +34,7 @@ jobs:
       run:
         shell: bash
     container:
-      image: quay.io/opencv-ci/opencv-ubuntu-20.04:20220901
+      image: quay.io/opencv-ci/opencv-ubuntu-20.04:20230410
       volumes:
         - /home/opencv-cn/git_cache:/home/ci/git_cache
         - /home/opencv-cn/ci_cache/opencv_contrib:/home/ci/.ccache

.github/workflows/OCV-Contrib-PR-5.x-U20.yaml

@@ -34,7 +34,7 @@ jobs:
       run:
         shell: bash
     container:
-      image: quay.io/opencv-ci/opencv-ubuntu-20.04:20220901
+      image: quay.io/opencv-ci/opencv-ubuntu-20.04:20230410
       volumes:
         - /home/opencv-cn/git_cache:/home/ci/git_cache
         - /home/opencv-cn/ci_cache/opencv_contrib:/home/ci/.ccache

.github/workflows/OCV-PR-4.x-U20.yaml

@@ -33,7 +33,7 @@ jobs:
       run:
         shell: bash
     container:
-      image: quay.io/opencv-ci/opencv-ubuntu-20.04:20220901
+      image: quay.io/opencv-ci/opencv-ubuntu-20.04:20230410
       volumes:
         - /home/opencv-cn/git_cache:/home/ci/git_cache
         - /home/opencv-cn/ci_cache/opencv:/home/ci/.ccache
@@ -257,7 +257,7 @@ jobs:
       run:
         shell: bash
     container:
-      image: quay.io/opencv-ci/opencv-ubuntu-20.04:20220901
+      image: quay.io/opencv-ci/opencv-ubuntu-20.04:20230410
       volumes:
         - /home/opencv-cn/git_cache:/home/ci/git_cache
         - /home/opencv-cn/ci_cache/opencv:/home/ci/.ccache

.github/workflows/OCV-PR-5.x-U20.yaml

@@ -33,7 +33,7 @@ jobs:
       run:
         shell: bash
     container:
-      image: quay.io/opencv-ci/opencv-ubuntu-20.04:20220901
+      image: quay.io/opencv-ci/opencv-ubuntu-20.04:20230410
       volumes:
         - /home/opencv-cn/git_cache:/home/ci/git_cache
         - /home/opencv-cn/ci_cache/opencv:/home/ci/.ccache
@@ -271,7 +271,7 @@ jobs:
       run:
         shell: bash
     container:
-      image: quay.io/opencv-ci/opencv-ubuntu-20.04:20220901
+      image: quay.io/opencv-ci/opencv-ubuntu-20.04:20230410
       volumes:
         - /home/opencv-cn/git_cache:/home/ci/git_cache
         - /home/opencv-cn/ci_cache/opencv:/home/ci/.ccache