CI: Fix typo in cache key

Author: simonsan

.github/workflows/ci.yml

@@ -25,7 +25,7 @@ jobs:
         with:
           path: |
             ~/.cargo/bin
-          key: ${{ runner.os }}-${{ steps.mdbook-version.outputs.MDBOOK_VERSION }}--${{ steps.mdbook-version.outputs.DBOOK_LINKCHECK_VERSION }}--${{ steps.mdbook-version.outputs.MDBOOK_TOC_VERSION }}
+          key: ${{ runner.os }}-${{ steps.mdbook-version.outputs.MDBOOK_VERSION }}--${{ steps.mdbook-version.outputs.MDBOOK_LINKCHECK_VERSION }}--${{ steps.mdbook-version.outputs.MDBOOK_TOC_VERSION }}
 
       - name: Install latest stable Rust toolchain
         if: steps.mdbook-cache.outputs.cache-hit != 'true'
@@ -63,7 +63,7 @@ jobs:
         with:
           path: |
             ~/.cargo/bin
-          key: ${{ runner.os }}-${{ steps.mdbook-version.outputs.MDBOOK_VERSION }}--${{ steps.mdbook-version.outputs.DBOOK_LINKCHECK_VERSION }}--${{ steps.mdbook-version.outputs.MDBOOK_TOC_VERSION }}
+          key: ${{ runner.os }}-${{ steps.mdbook-version.outputs.MDBOOK_VERSION }}--${{ steps.mdbook-version.outputs.MDBOOK_LINKCHECK_VERSION }}--${{ steps.mdbook-version.outputs.MDBOOK_TOC_VERSION }}
 
       - name: Install latest stable Rust toolchain
         if: steps.mdbook-cache.outputs.cache-hit != 'true'

.github/workflows/gh-pages.yml

@@ -25,7 +25,7 @@ jobs:
         with:
           path: |
             ~/.cargo/bin
-          key: ${{ runner.os }}-${{ steps.mdbook-version.outputs.MDBOOK_VERSION }}--${{ steps.mdbook-version.outputs.DBOOK_LINKCHECK_VERSION }}--${{ steps.mdbook-version.outputs.MDBOOK_TOC_VERSION }}
+          key: ${{ runner.os }}-${{ steps.mdbook-version.outputs.MDBOOK_VERSION }}--${{ steps.mdbook-version.outputs.MDBOOK_LINKCHECK_VERSION }}--${{ steps.mdbook-version.outputs.MDBOOK_TOC_VERSION }}
 
       - name: Install latest stable Rust toolchain
         if: steps.mdbook-cache.outputs.cache-hit != 'true'