Use a cache ID that includes the flavor

Otherwise, a `build-installers`-flavored artifact could potentially be
restored from a `minimal`-flavored cached one, which would be incorrect.

Signed-off-by: Johannes Schindelin <johannes.schindelin@gmx.de>

Author: dscho

src/git.ts

@@ -69,7 +69,7 @@ export async function getViaGit(
   const artifactName = `${repo}-${flavor}`
 
   const octokit = new Octokit()
-  let id: string
+  let head_sha: string
   if (flavor === 'minimal') {
     const info = await octokit.actions.listWorkflowRuns({
       owner,
@@ -78,16 +78,17 @@ export async function getViaGit(
       status: 'success',
       per_page: 1
     })
-    id = info.data.workflow_runs[0].head_sha
+    head_sha = info.data.workflow_runs[0].head_sha
   } else {
     const info = await octokit.repos.getBranch({
       owner,
       repo,
       branch: 'main'
     })
-    id = info.data.commit.sha
+    head_sha = info.data.commit.sha
   }
-  core.notice(`Got ID ${id} for ${repo}`)
+  const id = `${artifactName}-${head_sha}`
+  core.notice(`Got commit ${head_sha} for ${repo}`)
 
   return {
     artifactName,
@@ -109,7 +110,7 @@ export async function getViaGit(
         core.startGroup(`Checking out ${repo}`)
         child = spawn(
           'git.exe',
-          [`--git-dir=.tmp`, 'worktree', 'add', outputDirectory, id],
+          [`--git-dir=.tmp`, 'worktree', 'add', outputDirectory, head_sha],
           {
             env: {
               GIT_CONFIG_PARAMETERS