Update CI to Godot 3.5.1-rc1

Author: Bromeon

.github/composite/godot/action.yml

@@ -33,13 +33,15 @@ runs:
         key: godot-${{ runner.os }}-v${{ inputs.godot_ver }}
     - name: "Install Godot"
       if: steps.cache-godot.outputs.cache-hit != 'true'
+      # filePath: transforms '3.5.1-rc1' into '3.5.1/rc1' and '3.5.1-stable' into '3.5.1'
       run: |
-        wget --no-verbose "https://downloads.tuxfamily.org/godotengine/${{ inputs.godot_ver }}/Godot_v${{ inputs.godot_ver }}-stable_linux_headless.64.zip" -O /tmp/godot.zip
+        filePath=$(echo "${{ inputs.godot_ver }}" | sed "s!-stable!!" | sed "s!-!/!")
+        wget --no-verbose "https://downloads.tuxfamily.org/godotengine/$filePath/Godot_v${{ inputs.godot_ver }}_linux_headless.64.zip" -O /tmp/godot.zip
         unzip -o /tmp/godot.zip -d ${{ runner.temp }}/godot_bin
       shell: bash
     - name: "Set environment variable"
       run: |
-        echo "GODOT_BIN=${{ runner.temp }}/godot_bin/Godot_v${{ inputs.godot_ver }}-stable_linux_headless.64" >> $GITHUB_ENV
+        echo "GODOT_BIN=${{ runner.temp }}/godot_bin/Godot_v${{ inputs.godot_ver }}_linux_headless.64" >> $GITHUB_ENV
       shell: bash
     - name: "Build godot-rust"
       run: |

.github/workflows/full-ci.yml

@@ -276,18 +276,18 @@ jobs:
         include:
           # Latest Godot with different Rust versions
           - rust: stable
-            godot: "3.5"
+            godot: "3.5.1-rc1"
             postfix: ''
           - rust: nightly
-            godot: "3.5"
+            godot: "3.5.1-rc1"
             postfix: ' (nightly)'
           - rust: '1.56'
-            godot: "3.5"
+            godot: "3.5.1-rc1"
             postfix: ' (msrv 1.56)'
 
           # Test with oldest supported engine version
           - rust: stable
-            godot: "3.2"
+            godot: "3.2-stable"
             postfix: ''
             build_args: '--features custom-godot'