upgrade to ubuntu20.04 for github ci

.github/workflows/backend-ascend.yml

@@ -18,7 +18,7 @@ concurrency:
 
 jobs:
   build_sdk_demo:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         python-version: [3.7]

.github/workflows/backend-ncnn.yml

@@ -18,7 +18,7 @@ concurrency:
 
 jobs:
   test_onnx2ncnn:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         python-version: [3.7]

.github/workflows/backend-pplnn.yml

@@ -18,7 +18,7 @@ concurrency:
 
 jobs:
   script_install:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         python-version: [3.7]

.github/workflows/backend-rknn.yml

@@ -19,7 +19,7 @@ concurrency:
 
 jobs:
   build_rknpu2:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
@@ -31,7 +31,7 @@ jobs:
         run: |
           sh -x tools/scripts/ubuntu_cross_build_rknn.sh rk3588
   build_rknpu:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3

.github/workflows/backend-snpe.yml

@@ -18,7 +18,7 @@ concurrency:
 
 jobs:
   build_sdk_demo:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3

.github/workflows/backend-torchscript.yml

@@ -18,7 +18,7 @@ concurrency:
 
 jobs:
   script_install:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         python-version: [3.7]

.github/workflows/build.yml

@@ -22,7 +22,7 @@ concurrency:
 
 jobs:
   build_cpu_model_convert:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     strategy:
       matrix:
         python-version: [3.7]
@@ -70,7 +70,7 @@ jobs:
           pytest tests/test_deploy
 
   build_cpu_sdk:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3
@@ -116,7 +116,7 @@ jobs:
           sh -x tools/scripts/ubuntu_cross_build_aarch64.sh
 
   build_cuda102:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     container:
       image: pytorch/pytorch:1.9.0-cuda10.2-cudnn7-devel
     env:
@@ -164,7 +164,7 @@ jobs:
           coverage report -m
 
   build_cuda111:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     container:
       image: pytorch/pytorch:1.8.0-cuda11.1-cudnn8-devel
 

.github/workflows/java_api.yml

@@ -16,7 +16,7 @@ concurrency:
 
 jobs:
   test_java_api:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3

.github/workflows/lint.yml

@@ -4,7 +4,7 @@ on: [push, pull_request]
 
 jobs:
   lint:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       - uses: actions/checkout@v2
       - name: Set up Python 3.7

.github/workflows/quantize.yml

@@ -18,7 +18,7 @@ concurrency:
 
 jobs:
   test_ncnn_PTQ:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     container:
       image: pytorch/pytorch:1.8.0-cuda11.1-cudnn8-devel
 

.github/workflows/rust_api.yml

@@ -16,7 +16,7 @@ concurrency:
 
 jobs:
   test_rust_api:
-    runs-on: ubuntu-18.04
+    runs-on: ubuntu-20.04
     steps:
       - name: Checkout repository
         uses: actions/checkout@v3