bump github action julia version [skip ci]

Author: islent

.github/workflows/CI.yaml

@@ -11,7 +11,7 @@ jobs:
     strategy:
       matrix:
         version:
-          - '1.11.4'
+          - '1.11.6'
         os:
           - ubuntu-latest
           #- macOS-latest

.github/workflows/CompatHelper.yml

@@ -9,7 +9,7 @@ jobs:
     runs-on: ${{ matrix.os }}
     strategy:
       matrix:
-        julia-version: [1.6.0]
+        julia-version: [1.11.6]
         julia-arch: [x64]
         os: [ubuntu-latest]
     steps:

.github/workflows/CompatHelperManual.yml

@@ -9,7 +9,7 @@ jobs:
     if: "contains(github.event.head_commit.message, '[compat]')"
     strategy:
       matrix:
-        julia-version: [1.6.0]
+        julia-version: [1.11.6]
         julia-arch: [x64]
         os: [ubuntu-latest]
     steps:

.github/workflows/ManuallyBuildDoc.yml

@@ -11,7 +11,7 @@ jobs:
       - uses: actions/checkout@v1
       - uses: julia-actions/setup-julia@latest
         with:
-          version: '1.11.4'
+          version: '1.11.6'
       - run: sudo apt-get update && sudo apt-get install -y xorg-dev mesa-utils xvfb libgl1 freeglut3-dev libxrandr-dev libxinerama-dev libxcursor-dev libxi-dev libxext-dev
       - run: julia --project=docs -e '
           using Pkg;