ci: PDF workflow skips craft-cms changes and pins the plate-test actions

.github/workflows/pdf.yml

@@ -3,9 +3,9 @@ name: Shared PDF
 on:
   push:
     branches: [main]
-    paths: ["crates/pdf/**", "crates/plate-test/**", "crates/prepress/**", "crates/cms/**", "vendor/hayro*/**", "vendor/krilla/**", "scripts/test-pdf-backends.sh", "scripts/*fetch-pdf-test-fonts.py", "Cargo.toml", "Cargo.lock", ".github/workflows/pdf.yml"]
+    paths: ["crates/pdf/**", "crates/plate-test/**", "crates/prepress/**", "vendor/hayro*/**", "vendor/krilla/**", "scripts/test-pdf-backends.sh", "scripts/*fetch-pdf-test-fonts.py", "Cargo.toml", "Cargo.lock", ".github/workflows/pdf.yml"]
   pull_request:
-    paths: ["crates/pdf/**", "crates/plate-test/**", "crates/prepress/**", "crates/cms/**", "vendor/hayro*/**", "vendor/krilla/**", "scripts/test-pdf-backends.sh", "scripts/*fetch-pdf-test-fonts.py", "Cargo.toml", "Cargo.lock", ".github/workflows/pdf.yml"]
+    paths: ["crates/pdf/**", "crates/plate-test/**", "crates/prepress/**", "vendor/hayro*/**", "vendor/krilla/**", "scripts/test-pdf-backends.sh", "scripts/*fetch-pdf-test-fonts.py", "Cargo.toml", "Cargo.lock", ".github/workflows/pdf.yml"]
   workflow_dispatch:
 
 permissions:
@@ -91,10 +91,10 @@ jobs:
     runs-on: ubuntu-latest
     steps:
       - uses: actions/checkout@v4
-      - uses: dtolnay/rust-toolchain@stable
+      - uses: dtolnay/rust-toolchain@b725eda525362e7cf34af9a7243cac1e3f01a7ec # stable
         with:
           components: clippy
-      - uses: Swatinem/rust-cache@v2
+      - uses: Swatinem/rust-cache@d1527c8f67ef9af357290475d4af4b0fab8f12e0 # v2.9.3
         with:
           key: craft-plate-test
       - run: cargo clippy -p craft-plate-test -p craft-prepress --all-targets --locked -- -D warnings