Auto merge of rust-lang#5650 - imbsky:actions-cache-v2, r=flip1995

Bump actions/cache from v1 to v2

We just released v2. That includes a lot of improvements.
https://github.com/actions/cache/releases/tag/v2.0.0

changelog: none

Author: bors

.github/workflows/clippy.yml

@@ -49,7 +49,7 @@ jobs:
       run: cargo update
 
     - name: Cache cargo dir
-      uses: actions/cache@v1
+      uses: actions/cache@v2
       with:
         path: ~/.cargo
         key: ${{ runner.os }}-x86_64-unknown-linux-gnu-${{ hashFiles('Cargo.lock') }}

.github/workflows/clippy_bors.yml

@@ -94,7 +94,7 @@ jobs:
       run: cargo update
 
     - name: Cache cargo dir
-      uses: actions/cache@v1
+      uses: actions/cache@v2
       with:
         path: ~/.cargo
         key: ${{ runner.os }}-${{ matrix.host }}-${{ hashFiles('Cargo.lock') }}
@@ -190,7 +190,7 @@ jobs:
       run: cargo update
 
     - name: Cache cargo dir
-      uses: actions/cache@v1
+      uses: actions/cache@v2
       with:
         path: ~/.cargo
         key: ${{ runner.os }}-x86_64-unknown-linux-gnu-${{ hashFiles('Cargo.lock') }}
@@ -269,7 +269,7 @@ jobs:
       run: cargo update
 
     - name: Cache cargo dir
-      uses: actions/cache@v1
+      uses: actions/cache@v2
       with:
         path: ~/.cargo
         key: ${{ runner.os }}-x86_64-unknown-linux-gnu-${{ hashFiles('Cargo.lock') }}