Merge pull request #501 from scala-steward/update/sbt-github-actions-0.18.0

Update sbt-github-actions to 0.18.0

Author: ddworak

.github/workflows/clean.yml

@@ -17,6 +17,7 @@ jobs:
       GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
     steps:
       - name: Delete artifacts
+        shell: bash {0}
         run: |
           # Customize those three lines with your repository and credentials:
           REPO=${GITHUB_API_URL}/repos/${{ github.repository }}
@@ -25,7 +26,7 @@ jobs:
           ghapi() { curl --silent --location --user _:$GITHUB_TOKEN "$@"; }
 
           # A temporary file which receives HTTP response headers.
-          TMPFILE=/tmp/tmp.$$
+          TMPFILE=$(mktemp)
 
           # An associative array, key: artifact name, value: number of artifacts of that name.
           declare -A ARTCOUNT

project/plugins.sbt

@@ -9,4 +9,4 @@ addSbtPlugin("com.github.sbt" % "sbt-ci-release" % "1.5.12")
 addSbtPlugin("com.github.sbt" % "sbt-unidoc" % "0.5.0")
 addSbtPlugin("com.typesafe" % "sbt-mima-plugin" % "1.1.3")
 addSbtPlugin("com.timushev.sbt" % "sbt-updates" % "0.6.4")
-addSbtPlugin("com.github.sbt" % "sbt-github-actions" % "0.17.0")
+addSbtPlugin("com.github.sbt" % "sbt-github-actions" % "0.18.0")