Fix some deprecated GitHub action syntax issues

Signed-off-by: Christian Wolf <github@christianwolf.email>

.github/workflows/build-test-images.yml

@@ -23,12 +23,12 @@ jobs:
               shell: bash
               id: check
               run: |
-                echo "::set-output name=skip::false"
+                echo "skip=false" >> $GITHUB_OUTPUT
                 if [ -z "${{ secrets.DOCKER_HUB_TOKEN }}" ]; then
-                    echo "::set-output name=skip::true"
+                    echo "skip=true" >> $GITHUB_OUTPUT
                 fi
                 if [ -z "${{ secrets.DOCKER_HUB_USERNAME }}" ]; then
-                    echo "::set-output name=skip::true"
+                    echo "skip=true" >> $GITHUB_OUTPUT
                 fi
             
             - name: Checkout the app

.github/workflows/deploy-appstore.yml

@@ -29,7 +29,7 @@ jobs:
 
             -   name: Get the date
                 id: date
-                run: echo "::set-output name=date::$(date +%Y-%m-%d)"
+                run: echo "date=$(date +%Y-%m-%d)" >> $GITHUB_OUTPUT
             -   name: Use cache for NPM
                 uses: actions/cache@v3.0.11
                 with:
@@ -120,7 +120,7 @@ jobs:
                     ret=$? &&
                     code=$(echo "$curl_out" | tail -n 1) &&
                     msg=$(echo "$curl_out" | head -n -1) &&
-                    echo "::set-output name=code::$code" &&
-                    echo "::set-output name=msg::$msg" &&
+                    echo "code=$code" >> $GITHUB_OUTPUT &&
+                    echo "msg=$msg" >> $GITHUB_OUTPUT &&
                     echo "Result ($code): $msg" &&
                     echo "$code" | grep '^\([^45][0-9][0-9]\)$'

.github/workflows/pages.yml

@@ -41,7 +41,7 @@ jobs:
         run: |
           count=$(find docs/ -name \*.puml | wc -l)
           echo "There are $count plantuml files"
-          echo "::set-output name=num::$count"
+          echo "num=$count" >> $GITHUB_OUTPUT
       - name: Install PlantUML on demand
         if: steps.count-plantuml.outputs.num > 0
         run: |

.github/workflows/pull-checks.yml

@@ -21,7 +21,7 @@ jobs:
                 run: |
                     git diff HEAD~1 -- CHANGELOG.md
                     lines=$(git diff HEAD~1 -- CHANGELOG.md | wc -l)
-                    echo "::set-output name=lines::$lines"
+                    echo "lines=$lines" >> $GITHUB_OUTPUT
             
             -   name: Get all changed file names
                 id: file-names
@@ -31,7 +31,7 @@ jobs:
                     echo "$lines"
                     cnt="$(echo "$lines" | grep -v '^package-lock.json$' | wc -l)"
                     echo "That are $cnt changed files."
-                    echo "::set-output name=num::$cnt"
+                    echo "num=$cnt" >> $GITHUB_OUTPUT
 
             -   name: Error if the number of diff lines is zero
                 run: |
@@ -118,7 +118,7 @@ jobs:
                     fetch-depth: 1
             -   name: Get the date
                 id: date
-                run: echo "::set-output name=date::$(date +%Y-%m-%d)"
+                run: echo "date=$(date +%Y-%m-%d)" >> $GITHUB_OUTPUT
             -   name: Cache NPM cache
                 uses: actions/cache@v3.0.11
                 with:

.github/workflows/tests.yml

@@ -26,7 +26,7 @@ jobs:
             
         -   name: Get the date
             id: date
-            run: echo "::set-output name=date::$(date +%Y-%m-%d)"
+            run: echo "date=$(date +%Y-%m-%d)" >> $GITHUB_OUTPUT
         -   name: Cache NPM cache
             uses: actions/cache@v3.0.11
             with:
@@ -385,7 +385,7 @@ jobs:
             
         -   name: Get the date
             id: date
-            run: echo "::set-output name=date::$(date +%Y-%m-%d)"
+            run: echo "date=$(date +%Y-%m-%d)" >> $GITHUB_OUTPUT
         -   name: Use cache for NPM
             uses: actions/cache@v3.0.11
             with: