Bump GitHub Actions across major versions

Major-version bumps of pinned GitHub Actions; release notes reviewed against
usage in the phpstan-src/phpstan upgrade. All actions stay pinned to commit SHAs.

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>

Author: ondrejmirtes

.github/workflows/build.yml

@@ -199,15 +199,15 @@ jobs:
           egress-policy: audit
 
       - name: "Checkout"
-        uses: actions/checkout@34e114876b0b11c390a56381ad16ebd13914f8d5 # v4.3.1
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd # v6.0.2
 
       - name: "Install PHP"
         uses: "shivammathur/setup-php@7c071dfe9dc99bdf297fa79cb49ea005b9fcadbc" # v2
         with:
           coverage: "none"
           php-version: "8.5"
 
-      - uses: "ramsey/composer-install@3cf229dc2919194e9e36783941438d17239e8520" # v3
+      - uses: "ramsey/composer-install@65e4f84970763564f46a70b8a54b90d033b3bdda" # v4.0.0
 
       - name: "Name Collision Detector"
         run: "make name-collision"

.github/workflows/lint-workflows.yml

@@ -70,7 +70,7 @@ jobs:
           persist-credentials: false
 
       - name: Run Poutine
-        uses: boostsecurityio/poutine-action@84c0a0d32e8d57ae12651222be1eb15351429228 # v0.15.2
+        uses: boostsecurityio/poutine-action@e240ebd3eff8b2db5a8e5f6b28f58739d7db2247 # v1.1.4
 
       - name: Upload poutine SARIF file
         uses: github/codeql-action/upload-sarif@7211b7c8077ea37d8641b6271f6a365a22a5fbfa # v4.36.0
@@ -96,7 +96,7 @@ jobs:
           persist-credentials: false
 
       - name: Install the latest version of uv
-        uses: astral-sh/setup-uv@37802adc94f370d6bfd71619e3f0bf239e1f3b78 # v7.6.0
+        uses: astral-sh/setup-uv@08807647e7069bb48b6ef5acd8ec9567f424441b # v8.1.0
         with:
           enable-cache: false